python3Packages.langgraph: repair broken update, apply skipBulkUpdate

pkgs/development/python-modules/langgraph/default.nix

@@ -40,14 +40,14 @@
 }:
 buildPythonPackage rec {
   pname = "langgraph";
-  version = "2.1.1";
+  version = "0.6.4";
   pyproject = true;
 
   src = fetchFromGitHub {
     owner = "langchain-ai";
     repo = "langgraph";
-    tag = "checkpoint==${version}";
-    hash = "sha256-UY3AChShKfOrtOQzOm5vi3Yy3rlBc+TAje9L2L6My/U=";
+    tag = version;
+    hash = "sha256-9jl16cKp3E7j79PXrr/3splrcJtfQQN7yFJ5sfa6c+I=";
   };
 
   postgresqlTestSetupPost = ''
@@ -133,11 +133,15 @@ buildPythonPackage rec {
   ];
 
   # Since `langgraph` is the only unprefixed package, we have to use an explicit match
-  passthru.updateScript = nix-update-script {
-    extraArgs = [
-      "--version-regex"
-      "([0-9.]+)"
-    ];
+  passthru = {
+    # python updater script sets the wrong tag
+    skipBulkUpdate = true;
+    updateScript = nix-update-script {
+      extraArgs = [
+        "--version-regex"
+        "([0-9.]+)"
+      ];
+    };
   };
 
   meta = {