diff --git a/MODULE.bazel b/MODULE.bazel
index 8dba7014a..4377c1b00 100644
--- a/MODULE.bazel
+++ b/MODULE.bazel
@@ -119,27 +119,27 @@ use_repo(npm, "rules_haskell_npm")
 #### Development dependencies ####
 bazel_dep(
     name = "rules_nixpkgs_core",
-    version = "0.12.0",
+    version = "0.13.0",
     dev_dependency = True,
 )
 bazel_dep(
     name = "rules_nixpkgs_cc",
-    version = "0.12.0",
+    version = "0.13.0",
     dev_dependency = True,
 )
 bazel_dep(
     name = "rules_nixpkgs_python",
-    version = "0.12.0",
+    version = "0.13.0",
     dev_dependency = True,
 )
 bazel_dep(
     name = "rules_nixpkgs_go",
-    version = "0.12.0",
+    version = "0.13.0",
     dev_dependency = True,
 )
 bazel_dep(
     name = "rules_nixpkgs_posix",
-    version = "0.12.0",
+    version = "0.13.0",
     dev_dependency = True,
 )
 bazel_dep(
@@ -150,7 +150,7 @@ bazel_dep(
 )
 bazel_dep(
     name = "rules_nixpkgs_nodejs",
-    version = "0.12.0",
+    version = "0.13.0",
     dev_dependency = True,
 )
 
diff --git a/haskell/repositories.bzl b/haskell/repositories.bzl
index 580b85b47..c42b8b32d 100644
--- a/haskell/repositories.bzl
+++ b/haskell/repositories.bzl
@@ -8,8 +8,8 @@ load(
     "check_bazel_version_compatible",
 )
 
-_rules_nixpkgs_version = "0.12.0"
-_rules_nixpkgs_sha256 = "1adb04dc0416915fef427757f4272c4f7dacefeceeefc50f683aec7f7e9b787a"
+_rules_nixpkgs_version = "0.13.0"
+_rules_nixpkgs_sha256 = "30271f7bd380e4e20e4d7132c324946c4fdbc31ebe0bbb6638a0f61a37e74397"
 
 _rules_sh_version = "v0.4.0"
 _rules_sh_sha256 = "3243af3fcb3768633fd39f3654de773e5fb61471a2fae5762a1653c22c412d2c"
diff --git a/registry/modules/rules_nixpkgs_cc/0.12.0/source.json b/registry/modules/rules_nixpkgs_cc/0.12.0/source.json
deleted file mode 100644
index 11edf2cfe..000000000
--- a/registry/modules/rules_nixpkgs_cc/0.12.0/source.json
+++ /dev/null
@@ -1,5 +0,0 @@
-{
-    "integrity": "sha256-GtsE3AQWkV/vQndX9CcsT32s7+zu78UPaDrsf36beHo=",
-    "strip_prefix": "rules_nixpkgs-0.12.0/toolchains/cc",
-    "url": "https://github.com/tweag/rules_nixpkgs/releases/download/v0.12.0/rules_nixpkgs-0.12.0.tar.gz"
-}
diff --git a/registry/modules/rules_nixpkgs_cc/0.12.0/MODULE.bazel b/registry/modules/rules_nixpkgs_cc/0.13.0/MODULE.bazel
similarity index 63%
rename from registry/modules/rules_nixpkgs_cc/0.12.0/MODULE.bazel
rename to registry/modules/rules_nixpkgs_cc/0.13.0/MODULE.bazel
index 74eff4ac7..dfe0fc7f7 100644
--- a/registry/modules/rules_nixpkgs_cc/0.12.0/MODULE.bazel
+++ b/registry/modules/rules_nixpkgs_cc/0.13.0/MODULE.bazel
@@ -1,8 +1,8 @@
 module(
     name = "rules_nixpkgs_cc",
-    version = "0.12.0",
+    version = "0.13.0",
 )
 
-bazel_dep(name = "rules_nixpkgs_core", version = "0.12.0")
+bazel_dep(name = "rules_nixpkgs_core", version = "0.13.0")
 bazel_dep(name = "bazel_skylib", version = "1.0.3")
 bazel_dep(name = "rules_cc", version = "0.0.1")
diff --git a/registry/modules/rules_nixpkgs_cc/0.13.0/source.json b/registry/modules/rules_nixpkgs_cc/0.13.0/source.json
new file mode 100644
index 000000000..f03935e91
--- /dev/null
+++ b/registry/modules/rules_nixpkgs_cc/0.13.0/source.json
@@ -0,0 +1,5 @@
+{
+    "integrity": "sha256-MCcfe9OA5OIOTXEywySUbE/bwx6+C7tmOKD2GjfnQ5c=",
+    "strip_prefix": "rules_nixpkgs-0.13.0/toolchains/cc",
+    "url": "https://github.com/tweag/rules_nixpkgs/releases/download/v0.13.0/rules_nixpkgs-0.13.0.tar.gz"
+}
diff --git a/registry/modules/rules_nixpkgs_cc/metadata.json b/registry/modules/rules_nixpkgs_cc/metadata.json
index 926bcd4f3..d98c22568 100644
--- a/registry/modules/rules_nixpkgs_cc/metadata.json
+++ b/registry/modules/rules_nixpkgs_cc/metadata.json
@@ -12,6 +12,6 @@
       "name": "Andreas Herrmann"
     }
   ],
-  "versions": ["0.12.0"],
+  "versions": ["0.13.0"],
   "yanked_versions": []
 }
diff --git a/registry/modules/rules_nixpkgs_go/0.12.0/source.json b/registry/modules/rules_nixpkgs_go/0.12.0/source.json
deleted file mode 100644
index d5259769c..000000000
--- a/registry/modules/rules_nixpkgs_go/0.12.0/source.json
+++ /dev/null
@@ -1,5 +0,0 @@
-{
-    "integrity": "sha256-GtsE3AQWkV/vQndX9CcsT32s7+zu78UPaDrsf36beHo=",
-    "strip_prefix": "rules_nixpkgs-0.12.0/toolchains/go",
-    "url": "https://github.com/tweag/rules_nixpkgs/releases/download/v0.12.0/rules_nixpkgs-0.12.0.tar.gz"
-}
diff --git a/registry/modules/rules_nixpkgs_go/0.12.0/MODULE.bazel b/registry/modules/rules_nixpkgs_go/0.13.0/MODULE.bazel
similarity index 73%
rename from registry/modules/rules_nixpkgs_go/0.12.0/MODULE.bazel
rename to registry/modules/rules_nixpkgs_go/0.13.0/MODULE.bazel
index 646cebd15..ca991fb74 100644
--- a/registry/modules/rules_nixpkgs_go/0.12.0/MODULE.bazel
+++ b/registry/modules/rules_nixpkgs_go/0.13.0/MODULE.bazel
@@ -1,9 +1,9 @@
 module(
     name = "rules_nixpkgs_go",
-    version = "0.12.0",
+    version = "0.13.0",
 )
 
-bazel_dep(name = "rules_nixpkgs_core", version = "0.12.0")
+bazel_dep(name = "rules_nixpkgs_core", version = "0.13.0")
 bazel_dep(name = "rules_go", repo_name = "io_bazel_rules_go", version = "0.39.1")
 bazel_dep(name = "bazel_skylib", version = "1.0.3")
 bazel_dep(name = "platforms", version = "0.0.4")
diff --git a/registry/modules/rules_nixpkgs_go/0.13.0/source.json b/registry/modules/rules_nixpkgs_go/0.13.0/source.json
new file mode 100644
index 000000000..6f1fbfff3
--- /dev/null
+++ b/registry/modules/rules_nixpkgs_go/0.13.0/source.json
@@ -0,0 +1,5 @@
+{
+    "integrity": "sha256-MCcfe9OA5OIOTXEywySUbE/bwx6+C7tmOKD2GjfnQ5c=",
+    "strip_prefix": "rules_nixpkgs-0.13.0/toolchains/go",
+    "url": "https://github.com/tweag/rules_nixpkgs/releases/download/v0.13.0/rules_nixpkgs-0.13.0.tar.gz"
+}
diff --git a/registry/modules/rules_nixpkgs_go/metadata.json b/registry/modules/rules_nixpkgs_go/metadata.json
index 926bcd4f3..d98c22568 100644
--- a/registry/modules/rules_nixpkgs_go/metadata.json
+++ b/registry/modules/rules_nixpkgs_go/metadata.json
@@ -12,6 +12,6 @@
       "name": "Andreas Herrmann"
     }
   ],
-  "versions": ["0.12.0"],
+  "versions": ["0.13.0"],
   "yanked_versions": []
 }
diff --git a/registry/modules/rules_nixpkgs_java/0.12.0/source.json b/registry/modules/rules_nixpkgs_java/0.12.0/source.json
deleted file mode 100644
index d2e8b0211..000000000
--- a/registry/modules/rules_nixpkgs_java/0.12.0/source.json
+++ /dev/null
@@ -1,5 +0,0 @@
-{
-    "integrity": "sha256-GtsE3AQWkV/vQndX9CcsT32s7+zu78UPaDrsf36beHo=",
-    "strip_prefix": "rules_nixpkgs-0.12.0/toolchains/java",
-    "url": "https://github.com/tweag/rules_nixpkgs/releases/download/v0.12.0/rules_nixpkgs-0.12.0.tar.gz"
-}
diff --git a/registry/modules/rules_nixpkgs_java/0.12.0/MODULE.bazel b/registry/modules/rules_nixpkgs_java/0.13.0/MODULE.bazel
similarity index 61%
rename from registry/modules/rules_nixpkgs_java/0.12.0/MODULE.bazel
rename to registry/modules/rules_nixpkgs_java/0.13.0/MODULE.bazel
index 5c7a6ed6f..e68b67aba 100644
--- a/registry/modules/rules_nixpkgs_java/0.12.0/MODULE.bazel
+++ b/registry/modules/rules_nixpkgs_java/0.13.0/MODULE.bazel
@@ -1,9 +1,13 @@
 module(
     name = "rules_nixpkgs_java",
-    version = "0.12.0",
+    version = "0.13.0",
 )
 
-bazel_dep(name = "rules_nixpkgs_core", version = "0.12.0")
+bazel_dep(name = "rules_nixpkgs_core", version = "0.13.0")
+local_path_override(
+   module_name = "rules_nixpkgs_core",
+   path = "../../core",
+)
 bazel_dep(name = "rules_java", version = "7.3.1")
 bazel_dep(name = "bazel_skylib", version = "1.0.3")
 
diff --git a/registry/modules/rules_nixpkgs_java/0.13.0/source.json b/registry/modules/rules_nixpkgs_java/0.13.0/source.json
new file mode 100644
index 000000000..3c3f6885f
--- /dev/null
+++ b/registry/modules/rules_nixpkgs_java/0.13.0/source.json
@@ -0,0 +1,5 @@
+{
+    "integrity": "sha256-MCcfe9OA5OIOTXEywySUbE/bwx6+C7tmOKD2GjfnQ5c=",
+    "strip_prefix": "rules_nixpkgs-0.13.0/toolchains/java",
+    "url": "https://github.com/tweag/rules_nixpkgs/releases/download/v0.13.0/rules_nixpkgs-0.13.0.tar.gz"
+}
diff --git a/registry/modules/rules_nixpkgs_java/metadata.json b/registry/modules/rules_nixpkgs_java/metadata.json
index 926bcd4f3..d98c22568 100644
--- a/registry/modules/rules_nixpkgs_java/metadata.json
+++ b/registry/modules/rules_nixpkgs_java/metadata.json
@@ -12,6 +12,6 @@
       "name": "Andreas Herrmann"
     }
   ],
-  "versions": ["0.12.0"],
+  "versions": ["0.13.0"],
   "yanked_versions": []
 }
diff --git a/registry/modules/rules_nixpkgs_posix/0.12.0/source.json b/registry/modules/rules_nixpkgs_posix/0.12.0/source.json
deleted file mode 100644
index 1f0ee9c6e..000000000
--- a/registry/modules/rules_nixpkgs_posix/0.12.0/source.json
+++ /dev/null
@@ -1,5 +0,0 @@
-{
-    "integrity": "sha256-GtsE3AQWkV/vQndX9CcsT32s7+zu78UPaDrsf36beHo=",
-    "strip_prefix": "rules_nixpkgs-0.12.0/toolchains/posix",
-    "url": "https://github.com/tweag/rules_nixpkgs/releases/download/v0.12.0/rules_nixpkgs-0.12.0.tar.gz"
-}
diff --git a/registry/modules/rules_nixpkgs_posix/0.12.0/MODULE.bazel b/registry/modules/rules_nixpkgs_posix/0.13.0/MODULE.bazel
similarity index 63%
rename from registry/modules/rules_nixpkgs_posix/0.12.0/MODULE.bazel
rename to registry/modules/rules_nixpkgs_posix/0.13.0/MODULE.bazel
index 3693ab748..48e796201 100644
--- a/registry/modules/rules_nixpkgs_posix/0.12.0/MODULE.bazel
+++ b/registry/modules/rules_nixpkgs_posix/0.13.0/MODULE.bazel
@@ -1,8 +1,8 @@
 module(
     name = "rules_nixpkgs_posix",
-    version = "0.12.0",
+    version = "0.13.0",
 )
 
-bazel_dep(name = "rules_nixpkgs_core", version = "0.12.0")
+bazel_dep(name = "rules_nixpkgs_core", version = "0.13.0")
 bazel_dep(name = "rules_sh", version = "0.3.0")
 bazel_dep(name = "bazel_skylib", version = "1.0.3")
diff --git a/registry/modules/rules_nixpkgs_posix/0.13.0/source.json b/registry/modules/rules_nixpkgs_posix/0.13.0/source.json
new file mode 100644
index 000000000..2578b07a9
--- /dev/null
+++ b/registry/modules/rules_nixpkgs_posix/0.13.0/source.json
@@ -0,0 +1,5 @@
+{
+    "integrity": "sha256-MCcfe9OA5OIOTXEywySUbE/bwx6+C7tmOKD2GjfnQ5c=",
+    "strip_prefix": "rules_nixpkgs-0.13.0/toolchains/posix",
+    "url": "https://github.com/tweag/rules_nixpkgs/releases/download/v0.13.0/rules_nixpkgs-0.13.0.tar.gz"
+}
diff --git a/registry/modules/rules_nixpkgs_posix/metadata.json b/registry/modules/rules_nixpkgs_posix/metadata.json
index 926bcd4f3..d98c22568 100644
--- a/registry/modules/rules_nixpkgs_posix/metadata.json
+++ b/registry/modules/rules_nixpkgs_posix/metadata.json
@@ -12,6 +12,6 @@
       "name": "Andreas Herrmann"
     }
   ],
-  "versions": ["0.12.0"],
+  "versions": ["0.13.0"],
   "yanked_versions": []
 }
diff --git a/registry/modules/rules_nixpkgs_python/0.12.0/source.json b/registry/modules/rules_nixpkgs_python/0.12.0/source.json
deleted file mode 100644
index 60cb5415a..000000000
--- a/registry/modules/rules_nixpkgs_python/0.12.0/source.json
+++ /dev/null
@@ -1,5 +0,0 @@
-{
-    "integrity": "sha256-GtsE3AQWkV/vQndX9CcsT32s7+zu78UPaDrsf36beHo=",
-    "strip_prefix": "rules_nixpkgs-0.12.0/toolchains/python",
-    "url": "https://github.com/tweag/rules_nixpkgs/releases/download/v0.12.0/rules_nixpkgs-0.12.0.tar.gz"
-}
diff --git a/registry/modules/rules_nixpkgs_python/0.12.0/MODULE.bazel b/registry/modules/rules_nixpkgs_python/0.13.0/MODULE.bazel
similarity index 54%
rename from registry/modules/rules_nixpkgs_python/0.12.0/MODULE.bazel
rename to registry/modules/rules_nixpkgs_python/0.13.0/MODULE.bazel
index a867e1aea..5a2a656b7 100644
--- a/registry/modules/rules_nixpkgs_python/0.12.0/MODULE.bazel
+++ b/registry/modules/rules_nixpkgs_python/0.13.0/MODULE.bazel
@@ -1,7 +1,7 @@
 module(
     name = "rules_nixpkgs_python",
-    version = "0.12.0",
+    version = "0.13.0",
 )
 
-bazel_dep(name = "rules_nixpkgs_core", version = "0.12.0")
+bazel_dep(name = "rules_nixpkgs_core", version = "0.13.0")
 bazel_dep(name = "bazel_skylib", version = "1.0.3")
diff --git a/registry/modules/rules_nixpkgs_python/0.13.0/source.json b/registry/modules/rules_nixpkgs_python/0.13.0/source.json
new file mode 100644
index 000000000..8bb188237
--- /dev/null
+++ b/registry/modules/rules_nixpkgs_python/0.13.0/source.json
@@ -0,0 +1,5 @@
+{
+    "integrity": "sha256-MCcfe9OA5OIOTXEywySUbE/bwx6+C7tmOKD2GjfnQ5c=",
+    "strip_prefix": "rules_nixpkgs-0.13.0/toolchains/python",
+    "url": "https://github.com/tweag/rules_nixpkgs/releases/download/v0.13.0/rules_nixpkgs-0.13.0.tar.gz"
+}
diff --git a/registry/modules/rules_nixpkgs_python/metadata.json b/registry/modules/rules_nixpkgs_python/metadata.json
index 926bcd4f3..d98c22568 100644
--- a/registry/modules/rules_nixpkgs_python/metadata.json
+++ b/registry/modules/rules_nixpkgs_python/metadata.json
@@ -12,6 +12,6 @@
       "name": "Andreas Herrmann"
     }
   ],
-  "versions": ["0.12.0"],
+  "versions": ["0.13.0"],
   "yanked_versions": []
 }
diff --git a/rules_haskell_nix/MODULE.bazel b/rules_haskell_nix/MODULE.bazel
index 4cb43152c..e53e04b15 100644
--- a/rules_haskell_nix/MODULE.bazel
+++ b/rules_haskell_nix/MODULE.bazel
@@ -13,11 +13,11 @@ bazel_dep(
 )
 bazel_dep(
     name = "rules_nixpkgs_core",
-    version = "0.12.0",
+    version = "0.13.0",
 )
 bazel_dep(
     name = "rules_nixpkgs_posix",
-    version = "0.12.0",
+    version = "0.13.0",
 )
 bazel_dep(
     name = "platforms",
diff --git a/rules_haskell_tests/MODULE.bazel b/rules_haskell_tests/MODULE.bazel
index cffcd2058..6ee618014 100644
--- a/rules_haskell_tests/MODULE.bazel
+++ b/rules_haskell_tests/MODULE.bazel
@@ -21,11 +21,11 @@ bazel_dep(
 )
 bazel_dep(
     name = "rules_nixpkgs_cc",
-    version = "0.12.0",
+    version = "0.13.0",
 )
 bazel_dep(
     name = "rules_nixpkgs_python",
-    version = "0.12.0",
+    version = "0.13.0",
 )
 bazel_dep(
     name = "rules_python",
@@ -33,15 +33,15 @@ bazel_dep(
 )
 bazel_dep(
     name = "rules_nixpkgs_go",
-    version = "0.12.0",
+    version = "0.13.0",
 )
 bazel_dep(
     name = "rules_nixpkgs_posix",
-    version = "0.12.0",
+    version = "0.13.0",
 )
 bazel_dep(
     name = "rules_nixpkgs_nodejs",
-    version = "0.12.0",
+    version = "0.13.0",
 )
 bazel_dep(
     name = "platforms",