Running nixpkgs-update (https://github.com/NixOS/infra/blob/main/non-critical-infra/modules/nixpkgs-update/README.md) with UPDATE_INFO: bulwark 1.14.2 -> 1.20.0 https://github.com/bulwarkmail/webmail/releases
attrpath: bulwark
Checking auto update branch...
[version] 
[version] generic version rewriter does not support multiple hashes
[rustCrateVersion] 
[rustCrateVersion] No cargoHash found
[golangModuleVersion] 
[golangModuleVersion] Not a buildGoModule package with vendorHash
[npmDepsVersion] 
[npmDepsVersion] skipping because derivation has updateScript
[updateScript] 
[updateScript] Success
[updateScript] this derivation will be built:
  /nix/store/657dxjikkignnvg0942kh3mpb0kd1ddb-packages.json.drv
building '/nix/store/657dxjikkignnvg0942kh3mpb0kd1ddb-packages.json.drv'...
structuredAttrs is enabled

Going to be running update for following packages:
 - bulwark-1.14.2

Press Enter key to continue...
Running update for:
Enqueuing group of 1 packages
 - bulwark-1.14.2: UPDATING ...
 - bulwark-1.14.2: DONE.

Packages updated!

Diff after rewrites:
diff --git a/pkgs/by-name/bu/bulwark/package.nix b/pkgs/by-name/bu/bulwark/package.nix
index 535a50344026..15fbc7ca4e8f 100644
--- a/pkgs/by-name/bu/bulwark/package.nix
+++ b/pkgs/by-name/bu/bulwark/package.nix
@@ -10,13 +10,13 @@
 }:
 buildNpmPackage (finalAttrs: {
   pname = "bulwark";
-  version = "1.14.2";
+  version = "1.20.0";
 
   src = fetchFromGitHub {
     owner = "bulwarkmail";
     repo = "webmail";
     tag = finalAttrs.version;
-    hash = "sha256-fVYFas6YWt3IEXPFodduTLDk4jtGUaZpgSGXP7yUZcQ=";
+    hash = "sha256-oNTAR2SOXbOuO2f53Tl3T+DdMrufJnuziB1AhjOdh0A=";
     leaveDotGit = true;
     postFetch = ''
       cd "$out"
@@ -24,7 +24,7 @@ buildNpmPackage (finalAttrs: {
       find "$out" -name .git -print0 | xargs -0 rm -rf
     '';
   };
-  npmDepsHash = "sha256-0a/41q/e7h6FdBSJKhVPBHxEFsUdPLaA4yIpptBeQIU=";
+  npmDepsHash = "sha256-mcEfKiwb+zvic82Bnhgh1T9Yj0Ytam7VwtCR/ExMkFo=";
 
   strictDeps = true;
 

No auto update branch exists
There might already be an open PR for this update:
- bulwark: 1.14.2 -> 1.20.0, nixos/bulwark: remove default policies and refer to upstream; update upstream config references, bulwark-plugins: add missing plugins from extension store, bulwark-plugins: update
  URL "https://api.github.com/repos/NixOS/nixpkgs/issues/574920"