docutils 0 -> 1
attrpath: docutils
Checking auto update branch...
[version] 
[version] skipping because derivation has updateScript
[rustCrateVersion] 
[rustCrateVersion] No cargoSha256 or cargoHash found
[golangModuleVersion] 
[golangModuleVersion] Not a buildGoModule package with vendorSha256 or vendorHash
[npmDepsVersion] 
[npmDepsVersion] No npmDepsHash
[updateScript] 
[updateScript] Success
[updateScript] this derivation will be built:
  /nix/store/x64ic613kfc8vfci5jv9fm4y6ih1ywfj-packages.json.drv
building '/nix/store/x64ic613kfc8vfci5jv9fm4y6ih1ywfj-packages.json.drv'...

Going to be running update for following packages:
 - docutils-0.20.1

Press Enter key to continue...
Running update for:
 - docutils-0.20.1: UPDATING ...
 - docutils-0.20.1: DONE.

Packages updated!

Diff after rewrites:
diff --git a/pkgs/development/python-modules/docutils/default.nix b/pkgs/development/python-modules/docutils/default.nix
index 136f679fcf6e..545366373149 100644
--- a/pkgs/development/python-modules/docutils/default.nix
+++ b/pkgs/development/python-modules/docutils/default.nix
@@ -8,7 +8,7 @@
 
 buildPythonPackage rec {
   pname = "docutils";
-  version = "0.20.1";
+  version = "0.21.1";
 
   disabled = pythonOlder "3.7";
 
@@ -16,7 +16,7 @@ buildPythonPackage rec {
 
   src = fetchPypi {
     inherit pname version;
-    hash = "sha256-8IpOJ2w6FYOobc4+NKuj/gTQK7ot1R7RYQYkToqSPjs=";
+    hash = "sha256-ZSSdilNFvJXg9A8oC6Y8mOsk3jXGyPW2YuPolIreqD8=";
   };
 
   # Only Darwin needs LANG, but we could set it in general.

Package version did not change.