diff --git a/packages/ppx_deriving_decoders/ppx_deriving_decoders.1.0/opam b/packages/ppx_deriving_decoders/ppx_deriving_decoders.1.0/opam
new file mode 100644
index 00000000000..4297d1be4fb
--- /dev/null
+++ b/packages/ppx_deriving_decoders/ppx_deriving_decoders.1.0/opam
@@ -0,0 +1,45 @@
+# This file is generated by dune, edit dune-project instead
+opam-version: "2.0"
+synopsis: "Deriving Decoders using PPX"
+description:
+  "Using mattjbray/ocaml-decoders, use a ppx to automatically generate instances of a decoder for a particular type using PPX."
+maintainer: ["Ben Bellick <benbellick@pm.me>"]
+authors: ["Ben Bellick <benbellick@pm.me>"]
+license: "MIT"
+tags: ["decoders" "decoding" "json" "ppx"]
+homepage: "https://github.com/benbellick/ppx_deriving_decoders"
+doc: "https://github.com/benbellick/ppx_deriving_decoders"
+bug-reports: "https://github.com/benbellick/ppx_deriving_decoders/issues"
+depends: [
+  "ocaml" {>= "4.08.0"}
+  "dune" {>= "3.11"}
+  "ppxlib" {>= "0.20.0"}
+  "decoders" {>= "0.5.0"}
+  "containers" {>= "2.8"}
+  "decoders-yojson" {with-test}
+  "ppx_inline_test" {with-test}
+  "odoc" {with-doc}
+]
+build: [
+  ["dune" "subst"] {dev}
+  [
+    "dune"
+    "build"
+    "-p"
+    name
+    "-j"
+    jobs
+    "@install"
+    "@runtest" {with-test}
+    "@doc" {with-doc}
+  ]
+]
+dev-repo: "git+https://github.com/benbellick/ppx_deriving_decoders.git"
+url {
+  src:
+    "https://github.com/benbellick/ppx_deriving_decoders/archive/refs/tags/1.0.tar.gz"
+  checksum: [
+    "md5=9e806bddb897df2b8afedb51fd27a747"
+    "sha512=e72a298330f1bac8405c55db54e93c04085c1adaeb28fa416ebe1e86019733fc9cffef793a660e2a08a27b4230b1d66173af7d800b198622f11e543f3387d20c"
+  ]
+}