diff --git a/packages/octez-accuser-PsParisC/octez-accuser-PsParisC.21.0/opam b/packages/octez-accuser-PsParisC/octez-accuser-PsParisC.21.0/opam
index 7c8410b8017..f66e19f883f 100644
--- a/packages/octez-accuser-PsParisC/octez-accuser-PsParisC.21.0/opam
+++ b/packages/octez-accuser-PsParisC/octez-accuser-PsParisC.21.0/opam
@@ -26,3 +26,6 @@ url {
     "sha512=628c9d9f0378f1c72fc654e2478f3d45753f963f2ae2ca427c8c0e94838263f59284eacc662ab24a4f9c637e733f3a6e981cc1a57045c2031a1cfdcf257c9ad1"
   ]
 }
+conflicts: [
+  "stdcompat" {< "19"}
+]
diff --git a/packages/octez-accuser-PsQuebec/octez-accuser-PsQuebec.21.0/opam b/packages/octez-accuser-PsQuebec/octez-accuser-PsQuebec.21.0/opam
index 72376524927..fef5942ae0d 100644
--- a/packages/octez-accuser-PsQuebec/octez-accuser-PsQuebec.21.0/opam
+++ b/packages/octez-accuser-PsQuebec/octez-accuser-PsQuebec.21.0/opam
@@ -26,3 +26,6 @@ url {
     "sha512=628c9d9f0378f1c72fc654e2478f3d45753f963f2ae2ca427c8c0e94838263f59284eacc662ab24a4f9c637e733f3a6e981cc1a57045c2031a1cfdcf257c9ad1"
   ]
 }
+conflicts: [
+  "stdcompat" {< "19"}
+]
diff --git a/packages/octez-alcotezt/octez-alcotezt.21.0/opam b/packages/octez-alcotezt/octez-alcotezt.21.0/opam
index d78c174b60a..42ada2c1fe3 100644
--- a/packages/octez-alcotezt/octez-alcotezt.21.0/opam
+++ b/packages/octez-alcotezt/octez-alcotezt.21.0/opam
@@ -23,3 +23,6 @@ url {
     "sha512=628c9d9f0378f1c72fc654e2478f3d45753f963f2ae2ca427c8c0e94838263f59284eacc662ab24a4f9c637e733f3a6e981cc1a57045c2031a1cfdcf257c9ad1"
   ]
 }
+conflicts: [
+  "stdcompat" {< "19"}
+]
diff --git a/packages/octez-baker-PsParisC/octez-baker-PsParisC.21.0/opam b/packages/octez-baker-PsParisC/octez-baker-PsParisC.21.0/opam
index 343ea47085a..9906459adfa 100644
--- a/packages/octez-baker-PsParisC/octez-baker-PsParisC.21.0/opam
+++ b/packages/octez-baker-PsParisC/octez-baker-PsParisC.21.0/opam
@@ -26,3 +26,6 @@ url {
     "sha512=628c9d9f0378f1c72fc654e2478f3d45753f963f2ae2ca427c8c0e94838263f59284eacc662ab24a4f9c637e733f3a6e981cc1a57045c2031a1cfdcf257c9ad1"
   ]
 }
+conflicts: [
+  "stdcompat" {< "19"}
+]
diff --git a/packages/octez-baker-PsQuebec/octez-baker-PsQuebec.21.0/opam b/packages/octez-baker-PsQuebec/octez-baker-PsQuebec.21.0/opam
index 87e9951c8be..b5455d70b9b 100644
--- a/packages/octez-baker-PsQuebec/octez-baker-PsQuebec.21.0/opam
+++ b/packages/octez-baker-PsQuebec/octez-baker-PsQuebec.21.0/opam
@@ -26,3 +26,6 @@ url {
     "sha512=628c9d9f0378f1c72fc654e2478f3d45753f963f2ae2ca427c8c0e94838263f59284eacc662ab24a4f9c637e733f3a6e981cc1a57045c2031a1cfdcf257c9ad1"
   ]
 }
+conflicts: [
+  "stdcompat" {< "19"}
+]
diff --git a/packages/octez-client/octez-client.21.0/opam b/packages/octez-client/octez-client.21.0/opam
index 7ac9543ead0..31cff062dbc 100644
--- a/packages/octez-client/octez-client.21.0/opam
+++ b/packages/octez-client/octez-client.21.0/opam
@@ -40,29 +40,30 @@ depopts: [
   "octez-protocol-alpha-libs"
 ]
 conflicts: [
-  "tezos-client-genesis" { != version }
-  "tezos-client-demo-counter" { != version }
-  "octez-protocol-000-Ps9mPmXa-libs" { != version }
-  "octez-protocol-001-PtCJ7pwo-libs" { != version }
-  "octez-protocol-002-PsYLVpVv-libs" { != version }
-  "octez-protocol-003-PsddFKi3-libs" { != version }
-  "octez-protocol-004-Pt24m4xi-libs" { != version }
-  "octez-protocol-005-PsBabyM1-libs" { != version }
-  "octez-protocol-006-PsCARTHA-libs" { != version }
-  "octez-protocol-007-PsDELPH1-libs" { != version }
-  "octez-protocol-008-PtEdo2Zk-libs" { != version }
-  "octez-protocol-009-PsFLoren-libs" { != version }
-  "octez-protocol-010-PtGRANAD-libs" { != version }
-  "octez-protocol-011-PtHangz2-libs" { != version }
-  "octez-protocol-012-Psithaca-libs" { != version }
-  "octez-protocol-013-PtJakart-libs" { != version }
-  "octez-protocol-014-PtKathma-libs" { != version }
-  "octez-protocol-015-PtLimaPt-libs" { != version }
-  "octez-protocol-016-PtMumbai-libs" { != version }
-  "octez-protocol-017-PtNairob-libs" { != version }
-  "octez-protocol-018-Proxford-libs" { != version }
-  "octez-protocol-019-PtParisB-libs" { != version }
-  "octez-protocol-alpha-libs" { != version }
+  "tezos-client-genesis" {!= version}
+  "tezos-client-demo-counter" {!= version}
+  "octez-protocol-000-Ps9mPmXa-libs" {!= version}
+  "octez-protocol-001-PtCJ7pwo-libs" {!= version}
+  "octez-protocol-002-PsYLVpVv-libs" {!= version}
+  "octez-protocol-003-PsddFKi3-libs" {!= version}
+  "octez-protocol-004-Pt24m4xi-libs" {!= version}
+  "octez-protocol-005-PsBabyM1-libs" {!= version}
+  "octez-protocol-006-PsCARTHA-libs" {!= version}
+  "octez-protocol-007-PsDELPH1-libs" {!= version}
+  "octez-protocol-008-PtEdo2Zk-libs" {!= version}
+  "octez-protocol-009-PsFLoren-libs" {!= version}
+  "octez-protocol-010-PtGRANAD-libs" {!= version}
+  "octez-protocol-011-PtHangz2-libs" {!= version}
+  "octez-protocol-012-Psithaca-libs" {!= version}
+  "octez-protocol-013-PtJakart-libs" {!= version}
+  "octez-protocol-014-PtKathma-libs" {!= version}
+  "octez-protocol-015-PtLimaPt-libs" {!= version}
+  "octez-protocol-016-PtMumbai-libs" {!= version}
+  "octez-protocol-017-PtNairob-libs" {!= version}
+  "octez-protocol-018-Proxford-libs" {!= version}
+  "octez-protocol-019-PtParisB-libs" {!= version}
+  "octez-protocol-alpha-libs" {!= version}
+  "stdcompat" {< "19"}
 ]
 build: [
   ["rm" "-r" "vendors" "contrib"]
diff --git a/packages/octez-codec/octez-codec.21.0/opam b/packages/octez-codec/octez-codec.21.0/opam
index 1bf0d81085a..fba1c210c2d 100644
--- a/packages/octez-codec/octez-codec.21.0/opam
+++ b/packages/octez-codec/octez-codec.21.0/opam
@@ -34,24 +34,25 @@ depopts: [
   "octez-protocol-alpha-libs"
 ]
 conflicts: [
-  "octez-protocol-005-PsBabyM1-libs" { != version }
-  "octez-protocol-006-PsCARTHA-libs" { != version }
-  "octez-protocol-007-PsDELPH1-libs" { != version }
-  "octez-protocol-008-PtEdo2Zk-libs" { != version }
-  "octez-protocol-009-PsFLoren-libs" { != version }
-  "octez-protocol-010-PtGRANAD-libs" { != version }
-  "octez-protocol-011-PtHangz2-libs" { != version }
-  "octez-protocol-012-Psithaca-libs" { != version }
-  "octez-protocol-013-PtJakart-libs" { != version }
-  "octez-protocol-014-PtKathma-libs" { != version }
-  "octez-protocol-015-PtLimaPt-libs" { != version }
-  "octez-protocol-016-PtMumbai-libs" { != version }
-  "octez-protocol-017-PtNairob-libs" { != version }
-  "octez-protocol-018-Proxford-libs" { != version }
-  "octez-protocol-019-PtParisB-libs" { != version }
-  "octez-protocol-020-PsParisC-libs" { != version }
-  "octez-protocol-021-PsQuebec-libs" { != version }
-  "octez-protocol-alpha-libs" { != version }
+  "octez-protocol-005-PsBabyM1-libs" {!= version}
+  "octez-protocol-006-PsCARTHA-libs" {!= version}
+  "octez-protocol-007-PsDELPH1-libs" {!= version}
+  "octez-protocol-008-PtEdo2Zk-libs" {!= version}
+  "octez-protocol-009-PsFLoren-libs" {!= version}
+  "octez-protocol-010-PtGRANAD-libs" {!= version}
+  "octez-protocol-011-PtHangz2-libs" {!= version}
+  "octez-protocol-012-Psithaca-libs" {!= version}
+  "octez-protocol-013-PtJakart-libs" {!= version}
+  "octez-protocol-014-PtKathma-libs" {!= version}
+  "octez-protocol-015-PtLimaPt-libs" {!= version}
+  "octez-protocol-016-PtMumbai-libs" {!= version}
+  "octez-protocol-017-PtNairob-libs" {!= version}
+  "octez-protocol-018-Proxford-libs" {!= version}
+  "octez-protocol-019-PtParisB-libs" {!= version}
+  "octez-protocol-020-PsParisC-libs" {!= version}
+  "octez-protocol-021-PsQuebec-libs" {!= version}
+  "octez-protocol-alpha-libs" {!= version}
+  "stdcompat" {< "19"}
 ]
 build: [
   ["rm" "-r" "vendors" "contrib"]
diff --git a/packages/octez-crawler/octez-crawler.21.0/opam b/packages/octez-crawler/octez-crawler.21.0/opam
index 10123ab949d..58d42f67dd9 100644
--- a/packages/octez-crawler/octez-crawler.21.0/opam
+++ b/packages/octez-crawler/octez-crawler.21.0/opam
@@ -24,3 +24,6 @@ url {
     "sha512=628c9d9f0378f1c72fc654e2478f3d45753f963f2ae2ca427c8c0e94838263f59284eacc662ab24a4f9c637e733f3a6e981cc1a57045c2031a1cfdcf257c9ad1"
   ]
 }
+conflicts: [
+  "stdcompat" {< "19"}
+]
diff --git a/packages/octez-dac-client/octez-dac-client.21.0/opam b/packages/octez-dac-client/octez-dac-client.21.0/opam
index 2c49c1664e1..6e87dc54b63 100644
--- a/packages/octez-dac-client/octez-dac-client.21.0/opam
+++ b/packages/octez-dac-client/octez-dac-client.21.0/opam
@@ -19,7 +19,8 @@ depopts: [
   "octez-protocol-alpha-libs"
 ]
 conflicts: [
-  "octez-protocol-alpha-libs" { != version }
+  "octez-protocol-alpha-libs" {!= version}
+  "stdcompat" {< "19"}
 ]
 build: [
   ["rm" "-r" "vendors" "contrib"]
diff --git a/packages/octez-dac-node/octez-dac-node.21.0/opam b/packages/octez-dac-node/octez-dac-node.21.0/opam
index c9ab3a3c788..8ce58b99dd5 100644
--- a/packages/octez-dac-node/octez-dac-node.21.0/opam
+++ b/packages/octez-dac-node/octez-dac-node.21.0/opam
@@ -21,8 +21,9 @@ depopts: [
   "octez-protocol-alpha-libs"
 ]
 conflicts: [
-  "checkseum" { = "0.5.0" }
-  "octez-protocol-alpha-libs" { != version }
+  "checkseum" {= "0.5.0"}
+  "octez-protocol-alpha-libs" {!= version}
+  "stdcompat" {< "19"}
 ]
 build: [
   ["rm" "-r" "vendors" "contrib"]
diff --git a/packages/octez-dal-node/octez-dal-node.21.0/opam b/packages/octez-dal-node/octez-dal-node.21.0/opam
index fdb55a2d7aa..7bcebefd9bf 100644
--- a/packages/octez-dal-node/octez-dal-node.21.0/opam
+++ b/packages/octez-dal-node/octez-dal-node.21.0/opam
@@ -23,8 +23,9 @@ depopts: [
   "octez-protocol-alpha-libs"
 ]
 conflicts: [
-  "checkseum" { = "0.5.0" }
-  "octez-protocol-alpha-libs" { != version }
+  "checkseum" {= "0.5.0"}
+  "octez-protocol-alpha-libs" {!= version}
+  "stdcompat" {< "19"}
 ]
 build: [
   ["rm" "-r" "vendors" "contrib"]
diff --git a/packages/octez-distributed-internal/octez-distributed-internal.21.0/opam b/packages/octez-distributed-internal/octez-distributed-internal.21.0/opam
index 5bca748294d..fbc9966e2c5 100644
--- a/packages/octez-distributed-internal/octez-distributed-internal.21.0/opam
+++ b/packages/octez-distributed-internal/octez-distributed-internal.21.0/opam
@@ -23,3 +23,6 @@ url {
     "sha512=628c9d9f0378f1c72fc654e2478f3d45753f963f2ae2ca427c8c0e94838263f59284eacc662ab24a4f9c637e733f3a6e981cc1a57045c2031a1cfdcf257c9ad1"
   ]
 }
+conflicts: [
+  "stdcompat" {< "19"}
+]
diff --git a/packages/octez-distributed-lwt-internal/octez-distributed-lwt-internal.21.0/opam b/packages/octez-distributed-lwt-internal/octez-distributed-lwt-internal.21.0/opam
index 846330400e4..1d83788e564 100644
--- a/packages/octez-distributed-lwt-internal/octez-distributed-lwt-internal.21.0/opam
+++ b/packages/octez-distributed-lwt-internal/octez-distributed-lwt-internal.21.0/opam
@@ -26,3 +26,6 @@ url {
     "sha512=628c9d9f0378f1c72fc654e2478f3d45753f963f2ae2ca427c8c0e94838263f59284eacc662ab24a4f9c637e733f3a6e981cc1a57045c2031a1cfdcf257c9ad1"
   ]
 }
+conflicts: [
+  "stdcompat" {< "19"}
+]
diff --git a/packages/octez-injector/octez-injector.21.0/opam b/packages/octez-injector/octez-injector.21.0/opam
index d9090b75bb5..aa716b65aaf 100644
--- a/packages/octez-injector/octez-injector.21.0/opam
+++ b/packages/octez-injector/octez-injector.21.0/opam
@@ -26,3 +26,6 @@ url {
     "sha512=628c9d9f0378f1c72fc654e2478f3d45753f963f2ae2ca427c8c0e94838263f59284eacc662ab24a4f9c637e733f3a6e981cc1a57045c2031a1cfdcf257c9ad1"
   ]
 }
+conflicts: [
+  "stdcompat" {< "19"}
+]
diff --git a/packages/octez-internal-libs/octez-internal-libs.21.0/opam b/packages/octez-internal-libs/octez-internal-libs.21.0/opam
index 310b5cdda2c..374042673fa 100644
--- a/packages/octez-internal-libs/octez-internal-libs.21.0/opam
+++ b/packages/octez-internal-libs/octez-internal-libs.21.0/opam
@@ -49,3 +49,6 @@ url {
     "sha512=628c9d9f0378f1c72fc654e2478f3d45753f963f2ae2ca427c8c0e94838263f59284eacc662ab24a4f9c637e733f3a6e981cc1a57045c2031a1cfdcf257c9ad1"
   ]
 }
+conflicts: [
+  "stdcompat" {< "19"}
+]
diff --git a/packages/octez-l2-libs/octez-l2-libs.21.0/opam b/packages/octez-l2-libs/octez-l2-libs.21.0/opam
index 1414b6522ec..30bc7d0bf71 100644
--- a/packages/octez-l2-libs/octez-l2-libs.21.0/opam
+++ b/packages/octez-l2-libs/octez-l2-libs.21.0/opam
@@ -34,7 +34,8 @@ depends: [
   "tezt" { >= "4.1.0" & < "5.0.0" }
 ]
 conflicts: [
-  "checkseum" { = "0.5.0" }
+  "checkseum" {= "0.5.0"}
+  "stdcompat" {< "19"}
 ]
 build: [
   ["rm" "-r" "vendors" "contrib"]
diff --git a/packages/octez-libs/octez-libs.21.0/opam b/packages/octez-libs/octez-libs.21.0/opam
index c393f5cb6b1..c44c14669ca 100644
--- a/packages/octez-libs/octez-libs.21.0/opam
+++ b/packages/octez-libs/octez-libs.21.0/opam
@@ -87,7 +87,7 @@ x-opam-monorepo-opam-provided: [
   "tezos-sapling-parameters"
 ]
 conflicts: [
-  "checkseum" { = "0.5.0" }
+  "checkseum" {= "0.5.0"}
   "cohttp-lwt"
   "cohttp-lwt-unix"
   "data-encoding"
@@ -105,7 +105,8 @@ conflicts: [
   "resto-cohttp-server"
   "resto-directory"
   "resto-json"
-  "result" { < "1.5" }
+  "result" {< "1.5"}
+  "stdcompat" {< "19"}
 ]
 build: [
   ["rm" "-r" "vendors" "contrib"]
diff --git a/packages/octez-node-config/octez-node-config.21.0/opam b/packages/octez-node-config/octez-node-config.21.0/opam
index e470f770932..e8863319ab8 100644
--- a/packages/octez-node-config/octez-node-config.21.0/opam
+++ b/packages/octez-node-config/octez-node-config.21.0/opam
@@ -24,3 +24,6 @@ url {
     "sha512=628c9d9f0378f1c72fc654e2478f3d45753f963f2ae2ca427c8c0e94838263f59284eacc662ab24a4f9c637e733f3a6e981cc1a57045c2031a1cfdcf257c9ad1"
   ]
 }
+conflicts: [
+  "stdcompat" {< "19"}
+]
diff --git a/packages/octez-node/octez-node.21.0/opam b/packages/octez-node/octez-node.21.0/opam
index 787753ad769..3f171a5259d 100644
--- a/packages/octez-node/octez-node.21.0/opam
+++ b/packages/octez-node/octez-node.21.0/opam
@@ -66,45 +66,46 @@ depopts: [
   "octez-protocol-alpha-libs"
 ]
 conflicts: [
-  "tezos-protocol-genesis" { != version }
-  "tezos-protocol-demo-noops" { != version }
-  "tezos-protocol-demo-counter" { != version }
-  "tezos-protocol-001-PtCJ7pwo" { != version }
-  "tezos-protocol-002-PsYLVpVv" { != version }
-  "tezos-protocol-003-PsddFKi3" { != version }
-  "tezos-protocol-004-Pt24m4xi" { != version }
-  "tezos-protocol-005-PsBABY5H" { != version }
-  "tezos-protocol-005-PsBabyM1" { != version }
-  "tezos-protocol-006-PsCARTHA" { != version }
-  "tezos-protocol-007-PsDELPH1" { != version }
-  "octez-protocol-007-PsDELPH1-libs" { != version }
-  "tezos-protocol-008-PtEdoTez" { != version }
-  "tezos-protocol-008-PtEdo2Zk" { != version }
-  "octez-protocol-008-PtEdo2Zk-libs" { != version }
-  "tezos-protocol-009-PsFLoren" { != version }
-  "octez-protocol-009-PsFLoren-libs" { != version }
-  "tezos-protocol-010-PtGRANAD" { != version }
-  "octez-protocol-010-PtGRANAD-libs" { != version }
-  "tezos-protocol-011-PtHangz2" { != version }
-  "octez-protocol-011-PtHangz2-libs" { != version }
-  "tezos-protocol-012-Psithaca" { != version }
-  "octez-protocol-012-Psithaca-libs" { != version }
-  "tezos-protocol-013-PtJakart" { != version }
-  "octez-protocol-013-PtJakart-libs" { != version }
-  "tezos-protocol-014-PtKathma" { != version }
-  "octez-protocol-014-PtKathma-libs" { != version }
-  "tezos-protocol-015-PtLimaPt" { != version }
-  "octez-protocol-015-PtLimaPt-libs" { != version }
-  "tezos-protocol-016-PtMumbai" { != version }
-  "octez-protocol-016-PtMumbai-libs" { != version }
-  "tezos-protocol-017-PtNairob" { != version }
-  "octez-protocol-017-PtNairob-libs" { != version }
-  "tezos-protocol-018-Proxford" { != version }
-  "octez-protocol-018-Proxford-libs" { != version }
-  "tezos-protocol-019-PtParisB" { != version }
-  "octez-protocol-019-PtParisB-libs" { != version }
-  "tezos-protocol-alpha" { != version }
-  "octez-protocol-alpha-libs" { != version }
+  "tezos-protocol-genesis" {!= version}
+  "tezos-protocol-demo-noops" {!= version}
+  "tezos-protocol-demo-counter" {!= version}
+  "tezos-protocol-001-PtCJ7pwo" {!= version}
+  "tezos-protocol-002-PsYLVpVv" {!= version}
+  "tezos-protocol-003-PsddFKi3" {!= version}
+  "tezos-protocol-004-Pt24m4xi" {!= version}
+  "tezos-protocol-005-PsBABY5H" {!= version}
+  "tezos-protocol-005-PsBabyM1" {!= version}
+  "tezos-protocol-006-PsCARTHA" {!= version}
+  "tezos-protocol-007-PsDELPH1" {!= version}
+  "octez-protocol-007-PsDELPH1-libs" {!= version}
+  "tezos-protocol-008-PtEdoTez" {!= version}
+  "tezos-protocol-008-PtEdo2Zk" {!= version}
+  "octez-protocol-008-PtEdo2Zk-libs" {!= version}
+  "tezos-protocol-009-PsFLoren" {!= version}
+  "octez-protocol-009-PsFLoren-libs" {!= version}
+  "tezos-protocol-010-PtGRANAD" {!= version}
+  "octez-protocol-010-PtGRANAD-libs" {!= version}
+  "tezos-protocol-011-PtHangz2" {!= version}
+  "octez-protocol-011-PtHangz2-libs" {!= version}
+  "tezos-protocol-012-Psithaca" {!= version}
+  "octez-protocol-012-Psithaca-libs" {!= version}
+  "tezos-protocol-013-PtJakart" {!= version}
+  "octez-protocol-013-PtJakart-libs" {!= version}
+  "tezos-protocol-014-PtKathma" {!= version}
+  "octez-protocol-014-PtKathma-libs" {!= version}
+  "tezos-protocol-015-PtLimaPt" {!= version}
+  "octez-protocol-015-PtLimaPt-libs" {!= version}
+  "tezos-protocol-016-PtMumbai" {!= version}
+  "octez-protocol-016-PtMumbai-libs" {!= version}
+  "tezos-protocol-017-PtNairob" {!= version}
+  "octez-protocol-017-PtNairob-libs" {!= version}
+  "tezos-protocol-018-Proxford" {!= version}
+  "octez-protocol-018-Proxford-libs" {!= version}
+  "tezos-protocol-019-PtParisB" {!= version}
+  "octez-protocol-019-PtParisB-libs" {!= version}
+  "tezos-protocol-alpha" {!= version}
+  "octez-protocol-alpha-libs" {!= version}
+  "stdcompat" {< "19"}
 ]
 build: [
   ["rm" "-r" "vendors" "contrib"]
diff --git a/packages/octez-proto-libs/octez-proto-libs.21.0/opam b/packages/octez-proto-libs/octez-proto-libs.21.0/opam
index 86088480745..e6a4cc79839 100644
--- a/packages/octez-proto-libs/octez-proto-libs.21.0/opam
+++ b/packages/octez-proto-libs/octez-proto-libs.21.0/opam
@@ -33,3 +33,6 @@ url {
     "sha512=628c9d9f0378f1c72fc654e2478f3d45753f963f2ae2ca427c8c0e94838263f59284eacc662ab24a4f9c637e733f3a6e981cc1a57045c2031a1cfdcf257c9ad1"
   ]
 }
+conflicts: [
+  "stdcompat" {< "19"}
+]
diff --git a/packages/octez-protocol-000-Ps9mPmXa-libs/octez-protocol-000-Ps9mPmXa-libs.21.0/opam b/packages/octez-protocol-000-Ps9mPmXa-libs/octez-protocol-000-Ps9mPmXa-libs.21.0/opam
index 99731ddb4f2..ea3b8291586 100644
--- a/packages/octez-protocol-000-Ps9mPmXa-libs/octez-protocol-000-Ps9mPmXa-libs.21.0/opam
+++ b/packages/octez-protocol-000-Ps9mPmXa-libs/octez-protocol-000-Ps9mPmXa-libs.21.0/opam
@@ -25,3 +25,6 @@ url {
     "sha512=628c9d9f0378f1c72fc654e2478f3d45753f963f2ae2ca427c8c0e94838263f59284eacc662ab24a4f9c637e733f3a6e981cc1a57045c2031a1cfdcf257c9ad1"
   ]
 }
+conflicts: [
+  "stdcompat" {< "19"}
+]
diff --git a/packages/octez-protocol-001-PtCJ7pwo-libs/octez-protocol-001-PtCJ7pwo-libs.21.0/opam b/packages/octez-protocol-001-PtCJ7pwo-libs/octez-protocol-001-PtCJ7pwo-libs.21.0/opam
index eb254b6cfa9..3bd7e323ed9 100644
--- a/packages/octez-protocol-001-PtCJ7pwo-libs/octez-protocol-001-PtCJ7pwo-libs.21.0/opam
+++ b/packages/octez-protocol-001-PtCJ7pwo-libs/octez-protocol-001-PtCJ7pwo-libs.21.0/opam
@@ -27,3 +27,6 @@ url {
     "sha512=628c9d9f0378f1c72fc654e2478f3d45753f963f2ae2ca427c8c0e94838263f59284eacc662ab24a4f9c637e733f3a6e981cc1a57045c2031a1cfdcf257c9ad1"
   ]
 }
+conflicts: [
+  "stdcompat" {< "19"}
+]
diff --git a/packages/octez-protocol-002-PsYLVpVv-libs/octez-protocol-002-PsYLVpVv-libs.21.0/opam b/packages/octez-protocol-002-PsYLVpVv-libs/octez-protocol-002-PsYLVpVv-libs.21.0/opam
index d83df68a15e..0349b493b76 100644
--- a/packages/octez-protocol-002-PsYLVpVv-libs/octez-protocol-002-PsYLVpVv-libs.21.0/opam
+++ b/packages/octez-protocol-002-PsYLVpVv-libs/octez-protocol-002-PsYLVpVv-libs.21.0/opam
@@ -27,3 +27,6 @@ url {
     "sha512=628c9d9f0378f1c72fc654e2478f3d45753f963f2ae2ca427c8c0e94838263f59284eacc662ab24a4f9c637e733f3a6e981cc1a57045c2031a1cfdcf257c9ad1"
   ]
 }
+conflicts: [
+  "stdcompat" {< "19"}
+]
diff --git a/packages/octez-protocol-003-PsddFKi3-libs/octez-protocol-003-PsddFKi3-libs.21.0/opam b/packages/octez-protocol-003-PsddFKi3-libs/octez-protocol-003-PsddFKi3-libs.21.0/opam
index a23ef214c85..6dc12f1e9ff 100644
--- a/packages/octez-protocol-003-PsddFKi3-libs/octez-protocol-003-PsddFKi3-libs.21.0/opam
+++ b/packages/octez-protocol-003-PsddFKi3-libs/octez-protocol-003-PsddFKi3-libs.21.0/opam
@@ -27,3 +27,6 @@ url {
     "sha512=628c9d9f0378f1c72fc654e2478f3d45753f963f2ae2ca427c8c0e94838263f59284eacc662ab24a4f9c637e733f3a6e981cc1a57045c2031a1cfdcf257c9ad1"
   ]
 }
+conflicts: [
+  "stdcompat" {< "19"}
+]
diff --git a/packages/octez-protocol-004-Pt24m4xi-libs/octez-protocol-004-Pt24m4xi-libs.21.0/opam b/packages/octez-protocol-004-Pt24m4xi-libs/octez-protocol-004-Pt24m4xi-libs.21.0/opam
index 2c407a86c99..25725b554fb 100644
--- a/packages/octez-protocol-004-Pt24m4xi-libs/octez-protocol-004-Pt24m4xi-libs.21.0/opam
+++ b/packages/octez-protocol-004-Pt24m4xi-libs/octez-protocol-004-Pt24m4xi-libs.21.0/opam
@@ -27,3 +27,6 @@ url {
     "sha512=628c9d9f0378f1c72fc654e2478f3d45753f963f2ae2ca427c8c0e94838263f59284eacc662ab24a4f9c637e733f3a6e981cc1a57045c2031a1cfdcf257c9ad1"
   ]
 }
+conflicts: [
+  "stdcompat" {< "19"}
+]
diff --git a/packages/octez-protocol-005-PsBabyM1-libs/octez-protocol-005-PsBabyM1-libs.21.0/opam b/packages/octez-protocol-005-PsBabyM1-libs/octez-protocol-005-PsBabyM1-libs.21.0/opam
index 0fe0c0eae66..b46a1ea07ba 100644
--- a/packages/octez-protocol-005-PsBabyM1-libs/octez-protocol-005-PsBabyM1-libs.21.0/opam
+++ b/packages/octez-protocol-005-PsBabyM1-libs/octez-protocol-005-PsBabyM1-libs.21.0/opam
@@ -27,3 +27,6 @@ url {
     "sha512=628c9d9f0378f1c72fc654e2478f3d45753f963f2ae2ca427c8c0e94838263f59284eacc662ab24a4f9c637e733f3a6e981cc1a57045c2031a1cfdcf257c9ad1"
   ]
 }
+conflicts: [
+  "stdcompat" {< "19"}
+]
diff --git a/packages/octez-protocol-006-PsCARTHA-libs/octez-protocol-006-PsCARTHA-libs.21.0/opam b/packages/octez-protocol-006-PsCARTHA-libs/octez-protocol-006-PsCARTHA-libs.21.0/opam
index 164e08719c0..b339809abac 100644
--- a/packages/octez-protocol-006-PsCARTHA-libs/octez-protocol-006-PsCARTHA-libs.21.0/opam
+++ b/packages/octez-protocol-006-PsCARTHA-libs/octez-protocol-006-PsCARTHA-libs.21.0/opam
@@ -27,3 +27,6 @@ url {
     "sha512=628c9d9f0378f1c72fc654e2478f3d45753f963f2ae2ca427c8c0e94838263f59284eacc662ab24a4f9c637e733f3a6e981cc1a57045c2031a1cfdcf257c9ad1"
   ]
 }
+conflicts: [
+  "stdcompat" {< "19"}
+]
diff --git a/packages/octez-protocol-007-PsDELPH1-libs/octez-protocol-007-PsDELPH1-libs.21.0/opam b/packages/octez-protocol-007-PsDELPH1-libs/octez-protocol-007-PsDELPH1-libs.21.0/opam
index 8eadb6a589d..1a09024fb8c 100644
--- a/packages/octez-protocol-007-PsDELPH1-libs/octez-protocol-007-PsDELPH1-libs.21.0/opam
+++ b/packages/octez-protocol-007-PsDELPH1-libs/octez-protocol-007-PsDELPH1-libs.21.0/opam
@@ -27,3 +27,6 @@ url {
     "sha512=628c9d9f0378f1c72fc654e2478f3d45753f963f2ae2ca427c8c0e94838263f59284eacc662ab24a4f9c637e733f3a6e981cc1a57045c2031a1cfdcf257c9ad1"
   ]
 }
+conflicts: [
+  "stdcompat" {< "19"}
+]
diff --git a/packages/octez-protocol-008-PtEdo2Zk-libs/octez-protocol-008-PtEdo2Zk-libs.21.0/opam b/packages/octez-protocol-008-PtEdo2Zk-libs/octez-protocol-008-PtEdo2Zk-libs.21.0/opam
index 0f9fe9dfe00..f409d309a14 100644
--- a/packages/octez-protocol-008-PtEdo2Zk-libs/octez-protocol-008-PtEdo2Zk-libs.21.0/opam
+++ b/packages/octez-protocol-008-PtEdo2Zk-libs/octez-protocol-008-PtEdo2Zk-libs.21.0/opam
@@ -27,3 +27,6 @@ url {
     "sha512=628c9d9f0378f1c72fc654e2478f3d45753f963f2ae2ca427c8c0e94838263f59284eacc662ab24a4f9c637e733f3a6e981cc1a57045c2031a1cfdcf257c9ad1"
   ]
 }
+conflicts: [
+  "stdcompat" {< "19"}
+]
diff --git a/packages/octez-protocol-009-PsFLoren-libs/octez-protocol-009-PsFLoren-libs.21.0/opam b/packages/octez-protocol-009-PsFLoren-libs/octez-protocol-009-PsFLoren-libs.21.0/opam
index fdbfed87957..d31e5dc847c 100644
--- a/packages/octez-protocol-009-PsFLoren-libs/octez-protocol-009-PsFLoren-libs.21.0/opam
+++ b/packages/octez-protocol-009-PsFLoren-libs/octez-protocol-009-PsFLoren-libs.21.0/opam
@@ -28,3 +28,6 @@ url {
     "sha512=628c9d9f0378f1c72fc654e2478f3d45753f963f2ae2ca427c8c0e94838263f59284eacc662ab24a4f9c637e733f3a6e981cc1a57045c2031a1cfdcf257c9ad1"
   ]
 }
+conflicts: [
+  "stdcompat" {< "19"}
+]
diff --git a/packages/octez-protocol-010-PtGRANAD-libs/octez-protocol-010-PtGRANAD-libs.21.0/opam b/packages/octez-protocol-010-PtGRANAD-libs/octez-protocol-010-PtGRANAD-libs.21.0/opam
index 4aa3f3ed16a..49c7da04486 100644
--- a/packages/octez-protocol-010-PtGRANAD-libs/octez-protocol-010-PtGRANAD-libs.21.0/opam
+++ b/packages/octez-protocol-010-PtGRANAD-libs/octez-protocol-010-PtGRANAD-libs.21.0/opam
@@ -28,3 +28,6 @@ url {
     "sha512=628c9d9f0378f1c72fc654e2478f3d45753f963f2ae2ca427c8c0e94838263f59284eacc662ab24a4f9c637e733f3a6e981cc1a57045c2031a1cfdcf257c9ad1"
   ]
 }
+conflicts: [
+  "stdcompat" {< "19"}
+]
diff --git a/packages/octez-protocol-011-PtHangz2-libs/octez-protocol-011-PtHangz2-libs.21.0/opam b/packages/octez-protocol-011-PtHangz2-libs/octez-protocol-011-PtHangz2-libs.21.0/opam
index 6700b9903bf..3d5c1110370 100644
--- a/packages/octez-protocol-011-PtHangz2-libs/octez-protocol-011-PtHangz2-libs.21.0/opam
+++ b/packages/octez-protocol-011-PtHangz2-libs/octez-protocol-011-PtHangz2-libs.21.0/opam
@@ -28,3 +28,6 @@ url {
     "sha512=628c9d9f0378f1c72fc654e2478f3d45753f963f2ae2ca427c8c0e94838263f59284eacc662ab24a4f9c637e733f3a6e981cc1a57045c2031a1cfdcf257c9ad1"
   ]
 }
+conflicts: [
+  "stdcompat" {< "19"}
+]
diff --git a/packages/octez-protocol-012-Psithaca-libs/octez-protocol-012-Psithaca-libs.21.0/opam b/packages/octez-protocol-012-Psithaca-libs/octez-protocol-012-Psithaca-libs.21.0/opam
index 19ed9bdf5a2..1418aa38818 100644
--- a/packages/octez-protocol-012-Psithaca-libs/octez-protocol-012-Psithaca-libs.21.0/opam
+++ b/packages/octez-protocol-012-Psithaca-libs/octez-protocol-012-Psithaca-libs.21.0/opam
@@ -28,3 +28,6 @@ url {
     "sha512=628c9d9f0378f1c72fc654e2478f3d45753f963f2ae2ca427c8c0e94838263f59284eacc662ab24a4f9c637e733f3a6e981cc1a57045c2031a1cfdcf257c9ad1"
   ]
 }
+conflicts: [
+  "stdcompat" {< "19"}
+]
diff --git a/packages/octez-protocol-013-PtJakart-libs/octez-protocol-013-PtJakart-libs.21.0/opam b/packages/octez-protocol-013-PtJakart-libs/octez-protocol-013-PtJakart-libs.21.0/opam
index a2a80dcc95a..75c6494cb2b 100644
--- a/packages/octez-protocol-013-PtJakart-libs/octez-protocol-013-PtJakart-libs.21.0/opam
+++ b/packages/octez-protocol-013-PtJakart-libs/octez-protocol-013-PtJakart-libs.21.0/opam
@@ -28,3 +28,6 @@ url {
     "sha512=628c9d9f0378f1c72fc654e2478f3d45753f963f2ae2ca427c8c0e94838263f59284eacc662ab24a4f9c637e733f3a6e981cc1a57045c2031a1cfdcf257c9ad1"
   ]
 }
+conflicts: [
+  "stdcompat" {< "19"}
+]
diff --git a/packages/octez-protocol-014-PtKathma-libs/octez-protocol-014-PtKathma-libs.21.0/opam b/packages/octez-protocol-014-PtKathma-libs/octez-protocol-014-PtKathma-libs.21.0/opam
index 03d1e07f591..c45b727abaf 100644
--- a/packages/octez-protocol-014-PtKathma-libs/octez-protocol-014-PtKathma-libs.21.0/opam
+++ b/packages/octez-protocol-014-PtKathma-libs/octez-protocol-014-PtKathma-libs.21.0/opam
@@ -28,3 +28,6 @@ url {
     "sha512=628c9d9f0378f1c72fc654e2478f3d45753f963f2ae2ca427c8c0e94838263f59284eacc662ab24a4f9c637e733f3a6e981cc1a57045c2031a1cfdcf257c9ad1"
   ]
 }
+conflicts: [
+  "stdcompat" {< "19"}
+]
diff --git a/packages/octez-protocol-015-PtLimaPt-libs/octez-protocol-015-PtLimaPt-libs.21.0/opam b/packages/octez-protocol-015-PtLimaPt-libs/octez-protocol-015-PtLimaPt-libs.21.0/opam
index fa37e6d9a69..fc2ffb4dff8 100644
--- a/packages/octez-protocol-015-PtLimaPt-libs/octez-protocol-015-PtLimaPt-libs.21.0/opam
+++ b/packages/octez-protocol-015-PtLimaPt-libs/octez-protocol-015-PtLimaPt-libs.21.0/opam
@@ -28,3 +28,6 @@ url {
     "sha512=628c9d9f0378f1c72fc654e2478f3d45753f963f2ae2ca427c8c0e94838263f59284eacc662ab24a4f9c637e733f3a6e981cc1a57045c2031a1cfdcf257c9ad1"
   ]
 }
+conflicts: [
+  "stdcompat" {< "19"}
+]
diff --git a/packages/octez-protocol-016-PtMumbai-libs/octez-protocol-016-PtMumbai-libs.21.0/opam b/packages/octez-protocol-016-PtMumbai-libs/octez-protocol-016-PtMumbai-libs.21.0/opam
index f152026b244..af5dc4441dd 100644
--- a/packages/octez-protocol-016-PtMumbai-libs/octez-protocol-016-PtMumbai-libs.21.0/opam
+++ b/packages/octez-protocol-016-PtMumbai-libs/octez-protocol-016-PtMumbai-libs.21.0/opam
@@ -30,3 +30,6 @@ url {
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   ]
 }
+conflicts: [
+  "stdcompat" {< "19"}
+]
diff --git a/packages/octez-protocol-017-PtNairob-libs/octez-protocol-017-PtNairob-libs.21.0/opam b/packages/octez-protocol-017-PtNairob-libs/octez-protocol-017-PtNairob-libs.21.0/opam
index 8e47970d30f..3fadfa58dfd 100644
--- a/packages/octez-protocol-017-PtNairob-libs/octez-protocol-017-PtNairob-libs.21.0/opam
+++ b/packages/octez-protocol-017-PtNairob-libs/octez-protocol-017-PtNairob-libs.21.0/opam
@@ -30,3 +30,6 @@ url {
     "sha512=628c9d9f0378f1c72fc654e2478f3d45753f963f2ae2ca427c8c0e94838263f59284eacc662ab24a4f9c637e733f3a6e981cc1a57045c2031a1cfdcf257c9ad1"
   ]
 }
+conflicts: [
+  "stdcompat" {< "19"}
+]
diff --git a/packages/octez-protocol-018-Proxford-libs/octez-protocol-018-Proxford-libs.21.0/opam b/packages/octez-protocol-018-Proxford-libs/octez-protocol-018-Proxford-libs.21.0/opam
index fa6f044ddfb..c69e5e9622e 100644
--- a/packages/octez-protocol-018-Proxford-libs/octez-protocol-018-Proxford-libs.21.0/opam
+++ b/packages/octez-protocol-018-Proxford-libs/octez-protocol-018-Proxford-libs.21.0/opam
@@ -30,3 +30,6 @@ url {
     "sha512=628c9d9f0378f1c72fc654e2478f3d45753f963f2ae2ca427c8c0e94838263f59284eacc662ab24a4f9c637e733f3a6e981cc1a57045c2031a1cfdcf257c9ad1"
   ]
 }
+conflicts: [
+  "stdcompat" {< "19"}
+]
diff --git a/packages/octez-protocol-019-PtParisB-libs/octez-protocol-019-PtParisB-libs.21.0/opam b/packages/octez-protocol-019-PtParisB-libs/octez-protocol-019-PtParisB-libs.21.0/opam
index 781e3a606db..13b08980bd7 100644
--- a/packages/octez-protocol-019-PtParisB-libs/octez-protocol-019-PtParisB-libs.21.0/opam
+++ b/packages/octez-protocol-019-PtParisB-libs/octez-protocol-019-PtParisB-libs.21.0/opam
@@ -30,3 +30,6 @@ url {
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   ]
 }
+conflicts: [
+  "stdcompat" {< "19"}
+]
diff --git a/packages/octez-protocol-020-PsParisC-libs/octez-protocol-020-PsParisC-libs.21.0/opam b/packages/octez-protocol-020-PsParisC-libs/octez-protocol-020-PsParisC-libs.21.0/opam
index cc721161b4c..40e916c3d19 100644
--- a/packages/octez-protocol-020-PsParisC-libs/octez-protocol-020-PsParisC-libs.21.0/opam
+++ b/packages/octez-protocol-020-PsParisC-libs/octez-protocol-020-PsParisC-libs.21.0/opam
@@ -42,3 +42,6 @@ url {
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   ]
 }
+conflicts: [
+  "stdcompat" {< "19"}
+]
diff --git a/packages/octez-protocol-021-PsQuebec-libs/octez-protocol-021-PsQuebec-libs.21.0/opam b/packages/octez-protocol-021-PsQuebec-libs/octez-protocol-021-PsQuebec-libs.21.0/opam
index 19e362712eb..a16d9476eb6 100644
--- a/packages/octez-protocol-021-PsQuebec-libs/octez-protocol-021-PsQuebec-libs.21.0/opam
+++ b/packages/octez-protocol-021-PsQuebec-libs/octez-protocol-021-PsQuebec-libs.21.0/opam
@@ -42,3 +42,6 @@ url {
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   ]
 }
+conflicts: [
+  "stdcompat" {< "19"}
+]
diff --git a/packages/octez-protocol-alpha-libs/octez-protocol-alpha-libs.21.0/opam b/packages/octez-protocol-alpha-libs/octez-protocol-alpha-libs.21.0/opam
index 3f80d37f1ae..512d8c2300a 100644
--- a/packages/octez-protocol-alpha-libs/octez-protocol-alpha-libs.21.0/opam
+++ b/packages/octez-protocol-alpha-libs/octez-protocol-alpha-libs.21.0/opam
@@ -42,3 +42,6 @@ url {
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   ]
 }
+conflicts: [
+  "stdcompat" {< "19"}
+]
diff --git a/packages/octez-protocol-compiler/octez-protocol-compiler.21.0/opam b/packages/octez-protocol-compiler/octez-protocol-compiler.21.0/opam
index 6e9b0313e12..7ba9fe22e62 100644
--- a/packages/octez-protocol-compiler/octez-protocol-compiler.21.0/opam
+++ b/packages/octez-protocol-compiler/octez-protocol-compiler.21.0/opam
@@ -28,3 +28,6 @@ url {
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   ]
 }
+conflicts: [
+  "stdcompat" {< "19"}
+]
diff --git a/packages/octez-riscv-api/octez-riscv-api.21.0/opam b/packages/octez-riscv-api/octez-riscv-api.21.0/opam
index d5726d50456..ce738fa202f 100644
--- a/packages/octez-riscv-api/octez-riscv-api.21.0/opam
+++ b/packages/octez-riscv-api/octez-riscv-api.21.0/opam
@@ -23,3 +23,6 @@ url {
     "sha512=628c9d9f0378f1c72fc654e2478f3d45753f963f2ae2ca427c8c0e94838263f59284eacc662ab24a4f9c637e733f3a6e981cc1a57045c2031a1cfdcf257c9ad1"
   ]
 }
+conflicts: [
+  "stdcompat" {< "19"}
+]
diff --git a/packages/octez-riscv-pvm/octez-riscv-pvm.21.0/opam b/packages/octez-riscv-pvm/octez-riscv-pvm.21.0/opam
index b783440f935..8c74e9ae8db 100644
--- a/packages/octez-riscv-pvm/octez-riscv-pvm.21.0/opam
+++ b/packages/octez-riscv-pvm/octez-riscv-pvm.21.0/opam
@@ -24,3 +24,6 @@ url {
     "sha512=628c9d9f0378f1c72fc654e2478f3d45753f963f2ae2ca427c8c0e94838263f59284eacc662ab24a4f9c637e733f3a6e981cc1a57045c2031a1cfdcf257c9ad1"
   ]
 }
+conflicts: [
+  "stdcompat" {< "19"}
+]
diff --git a/packages/octez-rpc-process/octez-rpc-process.21.0/opam b/packages/octez-rpc-process/octez-rpc-process.21.0/opam
index 04807cacddf..76b30de0880 100644
--- a/packages/octez-rpc-process/octez-rpc-process.21.0/opam
+++ b/packages/octez-rpc-process/octez-rpc-process.21.0/opam
@@ -27,3 +27,6 @@ url {
     "sha512=628c9d9f0378f1c72fc654e2478f3d45753f963f2ae2ca427c8c0e94838263f59284eacc662ab24a4f9c637e733f3a6e981cc1a57045c2031a1cfdcf257c9ad1"
   ]
 }
+conflicts: [
+  "stdcompat" {< "19"}
+]
diff --git a/packages/octez-rust-deps/octez-rust-deps.21.0/opam b/packages/octez-rust-deps/octez-rust-deps.21.0/opam
index 4c0ec1b1739..c61c8a12ac8 100644
--- a/packages/octez-rust-deps/octez-rust-deps.21.0/opam
+++ b/packages/octez-rust-deps/octez-rust-deps.21.0/opam
@@ -22,3 +22,6 @@ url {
     "sha512=628c9d9f0378f1c72fc654e2478f3d45753f963f2ae2ca427c8c0e94838263f59284eacc662ab24a4f9c637e733f3a6e981cc1a57045c2031a1cfdcf257c9ad1"
   ]
 }
+conflicts: [
+  "stdcompat" {< "19"}
+]
diff --git a/packages/octez-shell-libs/octez-shell-libs.21.0/opam b/packages/octez-shell-libs/octez-shell-libs.21.0/opam
index 3ae150667f1..576e612aec6 100644
--- a/packages/octez-shell-libs/octez-shell-libs.21.0/opam
+++ b/packages/octez-shell-libs/octez-shell-libs.21.0/opam
@@ -39,8 +39,9 @@ depopts: [
   "ledgerwallet-tezos"
 ]
 conflicts: [
-  "checkseum" { = "0.5.0" }
-  "ledgerwallet-tezos" { < "0.4.0" }
+  "checkseum" {= "0.5.0"}
+  "ledgerwallet-tezos" {< "0.4.0"}
+  "stdcompat" {< "19"}
 ]
 build: [
   ["rm" "-r" "vendors" "contrib"]
diff --git a/packages/octez-signer/octez-signer.21.0/opam b/packages/octez-signer/octez-signer.21.0/opam
index 224b4d70bb4..dfe07e183a1 100644
--- a/packages/octez-signer/octez-signer.21.0/opam
+++ b/packages/octez-signer/octez-signer.21.0/opam
@@ -24,3 +24,6 @@ url {
     "sha512=628c9d9f0378f1c72fc654e2478f3d45753f963f2ae2ca427c8c0e94838263f59284eacc662ab24a4f9c637e733f3a6e981cc1a57045c2031a1cfdcf257c9ad1"
   ]
 }
+conflicts: [
+  "stdcompat" {< "19"}
+]
diff --git a/packages/octez-smart-rollup-node-Proxford/octez-smart-rollup-node-Proxford.21.0/opam b/packages/octez-smart-rollup-node-Proxford/octez-smart-rollup-node-Proxford.21.0/opam
index 51890f39887..8614ea328d2 100644
--- a/packages/octez-smart-rollup-node-Proxford/octez-smart-rollup-node-Proxford.21.0/opam
+++ b/packages/octez-smart-rollup-node-Proxford/octez-smart-rollup-node-Proxford.21.0/opam
@@ -26,7 +26,8 @@ depends: [
   "octez-version" { = version }
 ]
 conflicts: [
-  "checkseum" { = "0.5.0" }
+  "checkseum" {= "0.5.0"}
+  "stdcompat" {< "19"}
 ]
 build: [
   ["rm" "-r" "vendors" "contrib"]
diff --git a/packages/octez-smart-rollup-node-PsParisC/octez-smart-rollup-node-PsParisC.21.0/opam b/packages/octez-smart-rollup-node-PsParisC/octez-smart-rollup-node-PsParisC.21.0/opam
index fdb35918124..3052e99d28c 100644
--- a/packages/octez-smart-rollup-node-PsParisC/octez-smart-rollup-node-PsParisC.21.0/opam
+++ b/packages/octez-smart-rollup-node-PsParisC/octez-smart-rollup-node-PsParisC.21.0/opam
@@ -26,7 +26,8 @@ depends: [
   "octez-version" { = version }
 ]
 conflicts: [
-  "checkseum" { = "0.5.0" }
+  "checkseum" {= "0.5.0"}
+  "stdcompat" {< "19"}
 ]
 build: [
   ["rm" "-r" "vendors" "contrib"]
diff --git a/packages/octez-smart-rollup-node-PsQuebec/octez-smart-rollup-node-PsQuebec.21.0/opam b/packages/octez-smart-rollup-node-PsQuebec/octez-smart-rollup-node-PsQuebec.21.0/opam
index 3a097e964b1..3bca6317a26 100644
--- a/packages/octez-smart-rollup-node-PsQuebec/octez-smart-rollup-node-PsQuebec.21.0/opam
+++ b/packages/octez-smart-rollup-node-PsQuebec/octez-smart-rollup-node-PsQuebec.21.0/opam
@@ -27,7 +27,8 @@ depends: [
   "octez-version" { = version }
 ]
 conflicts: [
-  "checkseum" { = "0.5.0" }
+  "checkseum" {= "0.5.0"}
+  "stdcompat" {< "19"}
 ]
 build: [
   ["rm" "-r" "vendors" "contrib"]
diff --git a/packages/octez-smart-rollup-node-PtNairob/octez-smart-rollup-node-PtNairob.21.0/opam b/packages/octez-smart-rollup-node-PtNairob/octez-smart-rollup-node-PtNairob.21.0/opam
index 181dec2b791..c3f1a2d0ade 100644
--- a/packages/octez-smart-rollup-node-PtNairob/octez-smart-rollup-node-PtNairob.21.0/opam
+++ b/packages/octez-smart-rollup-node-PtNairob/octez-smart-rollup-node-PtNairob.21.0/opam
@@ -25,7 +25,8 @@ depends: [
   "octez-version" { = version }
 ]
 conflicts: [
-  "checkseum" { = "0.5.0" }
+  "checkseum" {= "0.5.0"}
+  "stdcompat" {< "19"}
 ]
 build: [
   ["rm" "-r" "vendors" "contrib"]
diff --git a/packages/octez-smart-rollup-node-PtParisB/octez-smart-rollup-node-PtParisB.21.0/opam b/packages/octez-smart-rollup-node-PtParisB/octez-smart-rollup-node-PtParisB.21.0/opam
index 73268a37c49..04d85e77952 100644
--- a/packages/octez-smart-rollup-node-PtParisB/octez-smart-rollup-node-PtParisB.21.0/opam
+++ b/packages/octez-smart-rollup-node-PtParisB/octez-smart-rollup-node-PtParisB.21.0/opam
@@ -26,7 +26,8 @@ depends: [
   "octez-version" { = version }
 ]
 conflicts: [
-  "checkseum" { = "0.5.0" }
+  "checkseum" {= "0.5.0"}
+  "stdcompat" {< "19"}
 ]
 build: [
   ["rm" "-r" "vendors" "contrib"]
diff --git a/packages/octez-smart-rollup-node-alpha/octez-smart-rollup-node-alpha.21.0/opam b/packages/octez-smart-rollup-node-alpha/octez-smart-rollup-node-alpha.21.0/opam
index 4cb2599bfbf..d3d483609ad 100644
--- a/packages/octez-smart-rollup-node-alpha/octez-smart-rollup-node-alpha.21.0/opam
+++ b/packages/octez-smart-rollup-node-alpha/octez-smart-rollup-node-alpha.21.0/opam
@@ -27,7 +27,8 @@ depends: [
   "octez-version" { = version }
 ]
 conflicts: [
-  "checkseum" { = "0.5.0" }
+  "checkseum" {= "0.5.0"}
+  "stdcompat" {< "19"}
 ]
 build: [
   ["rm" "-r" "vendors" "contrib"]
diff --git a/packages/octez-smart-rollup-node-lib/octez-smart-rollup-node-lib.21.0/opam b/packages/octez-smart-rollup-node-lib/octez-smart-rollup-node-lib.21.0/opam
index d7f41b5b9e5..3a6a619d2bd 100644
--- a/packages/octez-smart-rollup-node-lib/octez-smart-rollup-node-lib.21.0/opam
+++ b/packages/octez-smart-rollup-node-lib/octez-smart-rollup-node-lib.21.0/opam
@@ -33,3 +33,6 @@ url {
     "sha512=628c9d9f0378f1c72fc654e2478f3d45753f963f2ae2ca427c8c0e94838263f59284eacc662ab24a4f9c637e733f3a6e981cc1a57045c2031a1cfdcf257c9ad1"
   ]
 }
+conflicts: [
+  "stdcompat" {< "19"}
+]
diff --git a/packages/octez-smart-rollup-node/octez-smart-rollup-node.21.0/opam b/packages/octez-smart-rollup-node/octez-smart-rollup-node.21.0/opam
index 89528286444..9e805b579a0 100644
--- a/packages/octez-smart-rollup-node/octez-smart-rollup-node.21.0/opam
+++ b/packages/octez-smart-rollup-node/octez-smart-rollup-node.21.0/opam
@@ -22,10 +22,11 @@ depopts: [
   "octez-smart-rollup-node-alpha"
 ]
 conflicts: [
-  "octez-smart-rollup-node-PtNairob" { != version }
-  "octez-smart-rollup-node-Proxford" { != version }
-  "octez-smart-rollup-node-PtParisB" { != version }
-  "octez-smart-rollup-node-alpha" { != version }
+  "octez-smart-rollup-node-PtNairob" {!= version}
+  "octez-smart-rollup-node-Proxford" {!= version}
+  "octez-smart-rollup-node-PtParisB" {!= version}
+  "octez-smart-rollup-node-alpha" {!= version}
+  "stdcompat" {< "19"}
 ]
 build: [
   ["rm" "-r" "vendors" "contrib"]
diff --git a/packages/octez-smart-rollup-wasm-debugger-lib/octez-smart-rollup-wasm-debugger-lib.21.0/opam b/packages/octez-smart-rollup-wasm-debugger-lib/octez-smart-rollup-wasm-debugger-lib.21.0/opam
index b7a771935c3..2e4c800cbbd 100644
--- a/packages/octez-smart-rollup-wasm-debugger-lib/octez-smart-rollup-wasm-debugger-lib.21.0/opam
+++ b/packages/octez-smart-rollup-wasm-debugger-lib/octez-smart-rollup-wasm-debugger-lib.21.0/opam
@@ -28,3 +28,6 @@ url {
     "sha512=628c9d9f0378f1c72fc654e2478f3d45753f963f2ae2ca427c8c0e94838263f59284eacc662ab24a4f9c637e733f3a6e981cc1a57045c2031a1cfdcf257c9ad1"
   ]
 }
+conflicts: [
+  "stdcompat" {< "19"}
+]
diff --git a/packages/octez-smart-rollup-wasm-debugger-plugin/octez-smart-rollup-wasm-debugger-plugin.21.0/opam b/packages/octez-smart-rollup-wasm-debugger-plugin/octez-smart-rollup-wasm-debugger-plugin.21.0/opam
index 6182f1b82d6..7a9bb83834b 100644
--- a/packages/octez-smart-rollup-wasm-debugger-plugin/octez-smart-rollup-wasm-debugger-plugin.21.0/opam
+++ b/packages/octez-smart-rollup-wasm-debugger-plugin/octez-smart-rollup-wasm-debugger-plugin.21.0/opam
@@ -22,3 +22,6 @@ url {
     "sha512=628c9d9f0378f1c72fc654e2478f3d45753f963f2ae2ca427c8c0e94838263f59284eacc662ab24a4f9c637e733f3a6e981cc1a57045c2031a1cfdcf257c9ad1"
   ]
 }
+conflicts: [
+  "stdcompat" {< "19"}
+]
diff --git a/packages/octez-smart-rollup-wasm-debugger/octez-smart-rollup-wasm-debugger.21.0/opam b/packages/octez-smart-rollup-wasm-debugger/octez-smart-rollup-wasm-debugger.21.0/opam
index 98891364a86..35f6f7196d0 100644
--- a/packages/octez-smart-rollup-wasm-debugger/octez-smart-rollup-wasm-debugger.21.0/opam
+++ b/packages/octez-smart-rollup-wasm-debugger/octez-smart-rollup-wasm-debugger.21.0/opam
@@ -23,3 +23,6 @@ url {
     "sha512=628c9d9f0378f1c72fc654e2478f3d45753f963f2ae2ca427c8c0e94838263f59284eacc662ab24a4f9c637e733f3a6e981cc1a57045c2031a1cfdcf257c9ad1"
   ]
 }
+conflicts: [
+  "stdcompat" {< "19"}
+]
diff --git a/packages/octez-version/octez-version.21.0/opam b/packages/octez-version/octez-version.21.0/opam
index 714b8c461b4..2290561d046 100644
--- a/packages/octez-version/octez-version.21.0/opam
+++ b/packages/octez-version/octez-version.21.0/opam
@@ -24,3 +24,6 @@ url {
     "sha512=628c9d9f0378f1c72fc654e2478f3d45753f963f2ae2ca427c8c0e94838263f59284eacc662ab24a4f9c637e733f3a6e981cc1a57045c2031a1cfdcf257c9ad1"
   ]
 }
+conflicts: [
+  "stdcompat" {< "19"}
+]
diff --git a/packages/tezos-benchmark/tezos-benchmark.21.0/opam b/packages/tezos-benchmark/tezos-benchmark.21.0/opam
index 0dce88332d4..3ee04d67f79 100644
--- a/packages/tezos-benchmark/tezos-benchmark.21.0/opam
+++ b/packages/tezos-benchmark/tezos-benchmark.21.0/opam
@@ -26,3 +26,6 @@ url {
     "sha512=628c9d9f0378f1c72fc654e2478f3d45753f963f2ae2ca427c8c0e94838263f59284eacc662ab24a4f9c637e733f3a6e981cc1a57045c2031a1cfdcf257c9ad1"
   ]
 }
+conflicts: [
+  "stdcompat" {< "19"}
+]
diff --git a/packages/tezos-client-demo-counter/tezos-client-demo-counter.21.0/opam b/packages/tezos-client-demo-counter/tezos-client-demo-counter.21.0/opam
index b71658306eb..1f0f5491f1a 100644
--- a/packages/tezos-client-demo-counter/tezos-client-demo-counter.21.0/opam
+++ b/packages/tezos-client-demo-counter/tezos-client-demo-counter.21.0/opam
@@ -25,3 +25,6 @@ url {
     "sha512=628c9d9f0378f1c72fc654e2478f3d45753f963f2ae2ca427c8c0e94838263f59284eacc662ab24a4f9c637e733f3a6e981cc1a57045c2031a1cfdcf257c9ad1"
   ]
 }
+conflicts: [
+  "stdcompat" {< "19"}
+]
diff --git a/packages/tezos-client-genesis/tezos-client-genesis.21.0/opam b/packages/tezos-client-genesis/tezos-client-genesis.21.0/opam
index d9f116c080a..d9e7144fac1 100644
--- a/packages/tezos-client-genesis/tezos-client-genesis.21.0/opam
+++ b/packages/tezos-client-genesis/tezos-client-genesis.21.0/opam
@@ -26,3 +26,6 @@ url {
     "sha512=628c9d9f0378f1c72fc654e2478f3d45753f963f2ae2ca427c8c0e94838263f59284eacc662ab24a4f9c637e733f3a6e981cc1a57045c2031a1cfdcf257c9ad1"
   ]
 }
+conflicts: [
+  "stdcompat" {< "19"}
+]
diff --git a/packages/tezos-dac-client-lib/tezos-dac-client-lib.21.0/opam b/packages/tezos-dac-client-lib/tezos-dac-client-lib.21.0/opam
index 9a38f9405f7..377fc6707e6 100644
--- a/packages/tezos-dac-client-lib/tezos-dac-client-lib.21.0/opam
+++ b/packages/tezos-dac-client-lib/tezos-dac-client-lib.21.0/opam
@@ -25,3 +25,6 @@ url {
     "sha512=628c9d9f0378f1c72fc654e2478f3d45753f963f2ae2ca427c8c0e94838263f59284eacc662ab24a4f9c637e733f3a6e981cc1a57045c2031a1cfdcf257c9ad1"
   ]
 }
+conflicts: [
+  "stdcompat" {< "19"}
+]
diff --git a/packages/tezos-dac-lib/tezos-dac-lib.21.0/opam b/packages/tezos-dac-lib/tezos-dac-lib.21.0/opam
index 7d5beb013c0..02a444b9aa5 100644
--- a/packages/tezos-dac-lib/tezos-dac-lib.21.0/opam
+++ b/packages/tezos-dac-lib/tezos-dac-lib.21.0/opam
@@ -24,3 +24,6 @@ url {
     "sha512=628c9d9f0378f1c72fc654e2478f3d45753f963f2ae2ca427c8c0e94838263f59284eacc662ab24a4f9c637e733f3a6e981cc1a57045c2031a1cfdcf257c9ad1"
   ]
 }
+conflicts: [
+  "stdcompat" {< "19"}
+]
diff --git a/packages/tezos-dac-node-lib/tezos-dac-node-lib.21.0/opam b/packages/tezos-dac-node-lib/tezos-dac-node-lib.21.0/opam
index 0a309a38985..8b9477dfa28 100644
--- a/packages/tezos-dac-node-lib/tezos-dac-node-lib.21.0/opam
+++ b/packages/tezos-dac-node-lib/tezos-dac-node-lib.21.0/opam
@@ -27,3 +27,6 @@ url {
     "sha512=628c9d9f0378f1c72fc654e2478f3d45753f963f2ae2ca427c8c0e94838263f59284eacc662ab24a4f9c637e733f3a6e981cc1a57045c2031a1cfdcf257c9ad1"
   ]
 }
+conflicts: [
+  "stdcompat" {< "19"}
+]
diff --git a/packages/tezos-dal-node-lib/tezos-dal-node-lib.21.0/opam b/packages/tezos-dal-node-lib/tezos-dal-node-lib.21.0/opam
index c8d7ac44eda..1d9d82aea50 100644
--- a/packages/tezos-dal-node-lib/tezos-dal-node-lib.21.0/opam
+++ b/packages/tezos-dal-node-lib/tezos-dal-node-lib.21.0/opam
@@ -25,3 +25,6 @@ url {
     "sha512=628c9d9f0378f1c72fc654e2478f3d45753f963f2ae2ca427c8c0e94838263f59284eacc662ab24a4f9c637e733f3a6e981cc1a57045c2031a1cfdcf257c9ad1"
   ]
 }
+conflicts: [
+  "stdcompat" {< "19"}
+]
diff --git a/packages/tezos-dal-node-services/tezos-dal-node-services.21.0/opam b/packages/tezos-dal-node-services/tezos-dal-node-services.21.0/opam
index a7366e59a50..fefb96855d5 100644
--- a/packages/tezos-dal-node-services/tezos-dal-node-services.21.0/opam
+++ b/packages/tezos-dal-node-services/tezos-dal-node-services.21.0/opam
@@ -23,3 +23,6 @@ url {
     "sha512=628c9d9f0378f1c72fc654e2478f3d45753f963f2ae2ca427c8c0e94838263f59284eacc662ab24a4f9c637e733f3a6e981cc1a57045c2031a1cfdcf257c9ad1"
   ]
 }
+conflicts: [
+  "stdcompat" {< "19"}
+]
diff --git a/packages/tezos-openapi/tezos-openapi.21.0/opam b/packages/tezos-openapi/tezos-openapi.21.0/opam
index f6441439a6c..abc738a4ae8 100644
--- a/packages/tezos-openapi/tezos-openapi.21.0/opam
+++ b/packages/tezos-openapi/tezos-openapi.21.0/opam
@@ -25,3 +25,6 @@ url {
     "sha512=628c9d9f0378f1c72fc654e2478f3d45753f963f2ae2ca427c8c0e94838263f59284eacc662ab24a4f9c637e733f3a6e981cc1a57045c2031a1cfdcf257c9ad1"
   ]
 }
+conflicts: [
+  "stdcompat" {< "19"}
+]
diff --git a/packages/tezos-protocol-000-Ps9mPmXa/tezos-protocol-000-Ps9mPmXa.21.0/opam b/packages/tezos-protocol-000-Ps9mPmXa/tezos-protocol-000-Ps9mPmXa.21.0/opam
index 1aca5b90203..82bf41d8b2f 100644
--- a/packages/tezos-protocol-000-Ps9mPmXa/tezos-protocol-000-Ps9mPmXa.21.0/opam
+++ b/packages/tezos-protocol-000-Ps9mPmXa/tezos-protocol-000-Ps9mPmXa.21.0/opam
@@ -24,3 +24,6 @@ url {
     "sha512=628c9d9f0378f1c72fc654e2478f3d45753f963f2ae2ca427c8c0e94838263f59284eacc662ab24a4f9c637e733f3a6e981cc1a57045c2031a1cfdcf257c9ad1"
   ]
 }
+conflicts: [
+  "stdcompat" {< "19"}
+]
diff --git a/packages/tezos-protocol-001-PtCJ7pwo/tezos-protocol-001-PtCJ7pwo.21.0/opam b/packages/tezos-protocol-001-PtCJ7pwo/tezos-protocol-001-PtCJ7pwo.21.0/opam
index e91cef9e409..63e1ea1777b 100644
--- a/packages/tezos-protocol-001-PtCJ7pwo/tezos-protocol-001-PtCJ7pwo.21.0/opam
+++ b/packages/tezos-protocol-001-PtCJ7pwo/tezos-protocol-001-PtCJ7pwo.21.0/opam
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 }
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+]
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index ca6061e51df..08d175c3d50 100644
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+++ b/packages/tezos-protocol-002-PsYLVpVv/tezos-protocol-002-PsYLVpVv.21.0/opam
@@ -24,3 +24,6 @@ url {
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 }
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diff --git a/packages/tezos-protocol-003-PsddFKi3/tezos-protocol-003-PsddFKi3.21.0/opam b/packages/tezos-protocol-003-PsddFKi3/tezos-protocol-003-PsddFKi3.21.0/opam
index 9b1a1b6d854..df2060c3494 100644
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@@ -24,3 +24,6 @@ url {
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 }
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index 7a5111f12de..9ddb9cf5e31 100644
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@@ -24,3 +24,6 @@ url {
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 }
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index bb74c39a6eb..7c4e2e13abe 100644
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+++ b/packages/tezos-protocol-005-PsBABY5H/tezos-protocol-005-PsBABY5H.21.0/opam
@@ -24,3 +24,6 @@ url {
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 }
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index d0238db3319..116109da5e1 100644
--- a/packages/tezos-protocol-005-PsBabyM1/tezos-protocol-005-PsBabyM1.21.0/opam
+++ b/packages/tezos-protocol-005-PsBabyM1/tezos-protocol-005-PsBabyM1.21.0/opam
@@ -24,3 +24,6 @@ url {
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 }
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+]
diff --git a/packages/tezos-protocol-006-PsCARTHA/tezos-protocol-006-PsCARTHA.21.0/opam b/packages/tezos-protocol-006-PsCARTHA/tezos-protocol-006-PsCARTHA.21.0/opam
index 828205a49f5..1eea42663ba 100644
--- a/packages/tezos-protocol-006-PsCARTHA/tezos-protocol-006-PsCARTHA.21.0/opam
+++ b/packages/tezos-protocol-006-PsCARTHA/tezos-protocol-006-PsCARTHA.21.0/opam
@@ -24,3 +24,6 @@ url {
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 }
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index 73adc5b724b..891eebd7afc 100644
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+++ b/packages/tezos-protocol-007-PsDELPH1/tezos-protocol-007-PsDELPH1.21.0/opam
@@ -24,3 +24,6 @@ url {
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 }
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index ba9fd8e66e9..e0f6c9e8bd2 100644
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+++ b/packages/tezos-protocol-008-PtEdo2Zk/tezos-protocol-008-PtEdo2Zk.21.0/opam
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 }
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index 85e09453310..60fdec94f7b 100644
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@@ -24,3 +24,6 @@ url {
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 }
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index cd007480f73..753f60b1e98 100644
--- a/packages/tezos-protocol-009-PsFLoren/tezos-protocol-009-PsFLoren.21.0/opam
+++ b/packages/tezos-protocol-009-PsFLoren/tezos-protocol-009-PsFLoren.21.0/opam
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 }
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index a9fb0db04c4..cd5626932e3 100644
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 }
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diff --git a/packages/tezos-protocol-011-PtHangz2/tezos-protocol-011-PtHangz2.21.0/opam b/packages/tezos-protocol-011-PtHangz2/tezos-protocol-011-PtHangz2.21.0/opam
index ff298f3b16d..32649383d1a 100644
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 }
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+]
diff --git a/packages/tezos-protocol-012-Psithaca/tezos-protocol-012-Psithaca.21.0/opam b/packages/tezos-protocol-012-Psithaca/tezos-protocol-012-Psithaca.21.0/opam
index b1462554d2f..c2ffc02b2cd 100644
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+++ b/packages/tezos-protocol-012-Psithaca/tezos-protocol-012-Psithaca.21.0/opam
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 }
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+]
diff --git a/packages/tezos-protocol-013-PtJakart/tezos-protocol-013-PtJakart.21.0/opam b/packages/tezos-protocol-013-PtJakart/tezos-protocol-013-PtJakart.21.0/opam
index 523102e3101..2fc9e47ee56 100644
--- a/packages/tezos-protocol-013-PtJakart/tezos-protocol-013-PtJakart.21.0/opam
+++ b/packages/tezos-protocol-013-PtJakart/tezos-protocol-013-PtJakart.21.0/opam
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 }
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diff --git a/packages/tezos-protocol-014-PtKathma/tezos-protocol-014-PtKathma.21.0/opam b/packages/tezos-protocol-014-PtKathma/tezos-protocol-014-PtKathma.21.0/opam
index 92ac86f517f..97a4eca1073 100644
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+++ b/packages/tezos-protocol-014-PtKathma/tezos-protocol-014-PtKathma.21.0/opam
@@ -25,3 +25,6 @@ url {
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 }
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diff --git a/packages/tezos-protocol-015-PtLimaPt/tezos-protocol-015-PtLimaPt.21.0/opam b/packages/tezos-protocol-015-PtLimaPt/tezos-protocol-015-PtLimaPt.21.0/opam
index becb38b1204..dd7d3e5fbc3 100644
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+++ b/packages/tezos-protocol-015-PtLimaPt/tezos-protocol-015-PtLimaPt.21.0/opam
@@ -25,3 +25,6 @@ url {
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 }
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+]
diff --git a/packages/tezos-protocol-016-PtMumbai/tezos-protocol-016-PtMumbai.21.0/opam b/packages/tezos-protocol-016-PtMumbai/tezos-protocol-016-PtMumbai.21.0/opam
index 80f8fd22695..48b22a8db96 100644
--- a/packages/tezos-protocol-016-PtMumbai/tezos-protocol-016-PtMumbai.21.0/opam
+++ b/packages/tezos-protocol-016-PtMumbai/tezos-protocol-016-PtMumbai.21.0/opam
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 }
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+]
diff --git a/packages/tezos-protocol-017-PtNairob/tezos-protocol-017-PtNairob.21.0/opam b/packages/tezos-protocol-017-PtNairob/tezos-protocol-017-PtNairob.21.0/opam
index a75c1e5d244..dd8d8c438d5 100644
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+++ b/packages/tezos-protocol-017-PtNairob/tezos-protocol-017-PtNairob.21.0/opam
@@ -25,3 +25,6 @@ url {
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 }
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+]
diff --git a/packages/tezos-protocol-018-Proxford/tezos-protocol-018-Proxford.21.0/opam b/packages/tezos-protocol-018-Proxford/tezos-protocol-018-Proxford.21.0/opam
index 023dbf02224..3f22ce5e12d 100644
--- a/packages/tezos-protocol-018-Proxford/tezos-protocol-018-Proxford.21.0/opam
+++ b/packages/tezos-protocol-018-Proxford/tezos-protocol-018-Proxford.21.0/opam
@@ -25,3 +25,6 @@ url {
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 }
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diff --git a/packages/tezos-protocol-019-PtParisB/tezos-protocol-019-PtParisB.21.0/opam b/packages/tezos-protocol-019-PtParisB/tezos-protocol-019-PtParisB.21.0/opam
index d4f994274ec..2b87807140a 100644
--- a/packages/tezos-protocol-019-PtParisB/tezos-protocol-019-PtParisB.21.0/opam
+++ b/packages/tezos-protocol-019-PtParisB/tezos-protocol-019-PtParisB.21.0/opam
@@ -25,3 +25,6 @@ url {
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 }
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+]
diff --git a/packages/tezos-protocol-020-PsParisC/tezos-protocol-020-PsParisC.21.0/opam b/packages/tezos-protocol-020-PsParisC/tezos-protocol-020-PsParisC.21.0/opam
index 88da6063abe..44bbb1338f8 100644
--- a/packages/tezos-protocol-020-PsParisC/tezos-protocol-020-PsParisC.21.0/opam
+++ b/packages/tezos-protocol-020-PsParisC/tezos-protocol-020-PsParisC.21.0/opam
@@ -25,3 +25,6 @@ url {
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 }
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+]
diff --git a/packages/tezos-protocol-021-PsQuebec/tezos-protocol-021-PsQuebec.21.0/opam b/packages/tezos-protocol-021-PsQuebec/tezos-protocol-021-PsQuebec.21.0/opam
index 07d1268b146..c5994669d78 100644
--- a/packages/tezos-protocol-021-PsQuebec/tezos-protocol-021-PsQuebec.21.0/opam
+++ b/packages/tezos-protocol-021-PsQuebec/tezos-protocol-021-PsQuebec.21.0/opam
@@ -25,3 +25,6 @@ url {
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 }
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diff --git a/packages/tezos-protocol-alpha/tezos-protocol-alpha.21.0/opam b/packages/tezos-protocol-alpha/tezos-protocol-alpha.21.0/opam
index 5add746593a..7a6b25ed2ae 100644
--- a/packages/tezos-protocol-alpha/tezos-protocol-alpha.21.0/opam
+++ b/packages/tezos-protocol-alpha/tezos-protocol-alpha.21.0/opam
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 }
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diff --git a/packages/tezos-protocol-demo-counter/tezos-protocol-demo-counter.21.0/opam b/packages/tezos-protocol-demo-counter/tezos-protocol-demo-counter.21.0/opam
index 45a24accb82..096bf871dd3 100644
--- a/packages/tezos-protocol-demo-counter/tezos-protocol-demo-counter.21.0/opam
+++ b/packages/tezos-protocol-demo-counter/tezos-protocol-demo-counter.21.0/opam
@@ -24,3 +24,6 @@ url {
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 }
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diff --git a/packages/tezos-protocol-demo-noops/tezos-protocol-demo-noops.21.0/opam b/packages/tezos-protocol-demo-noops/tezos-protocol-demo-noops.21.0/opam
index baa28404d33..c5d436acc29 100644
--- a/packages/tezos-protocol-demo-noops/tezos-protocol-demo-noops.21.0/opam
+++ b/packages/tezos-protocol-demo-noops/tezos-protocol-demo-noops.21.0/opam
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 }
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diff --git a/packages/tezos-protocol-genesis/tezos-protocol-genesis.21.0/opam b/packages/tezos-protocol-genesis/tezos-protocol-genesis.21.0/opam
index 4e681d4a9f7..d4106505f17 100644
--- a/packages/tezos-protocol-genesis/tezos-protocol-genesis.21.0/opam
+++ b/packages/tezos-protocol-genesis/tezos-protocol-genesis.21.0/opam
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 }
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+]