Running nixpkgs-update (https://nix-community.org/update-bot/) with UPDATE_INFO: circt 0 -> 1
attrpath: circt
Checking auto update branch...
[version] 
[version] skipping because derivation has updateScript
[rustCrateVersion] 
[rustCrateVersion] No cargoHash found
[golangModuleVersion] 
[golangModuleVersion] Not a buildGoModule package with vendorHash
[npmDepsVersion] 
[npmDepsVersion] No npmDepsHash
[updateScript] 
[updateScript] Success
[updateScript] this derivation will be built:
  /nix/store/v4jy1057km5a6qw8fjcn2har0xm5i3kz-packages.json.drv
building '/nix/store/v4jy1057km5a6qw8fjcn2har0xm5i3kz-packages.json.drv'...

Going to be running update for following packages:
 - circt-1.147.0

Press Enter key to continue...
Running update for:
Enqueuing group of 1 packages
 - circt-1.147.0: UPDATING ...
 - circt-1.147.0: DONE.

Packages updated!

Diff after rewrites:
diff --git a/pkgs/by-name/ci/circt/package.nix b/pkgs/by-name/ci/circt/package.nix
index fdfc8496d016..7cf6d08416ee 100644
--- a/pkgs/by-name/ci/circt/package.nix
+++ b/pkgs/by-name/ci/circt/package.nix
@@ -27,12 +27,12 @@ let
 in
 stdenv.mkDerivation (finalAttrs: {
   pname = "circt";
-  version = "1.147.0";
+  version = "1.149.0";
   src = fetchFromGitHub {
     owner = "llvm";
     repo = "circt";
     tag = "firtool-${finalAttrs.version}";
-    hash = "sha256-rtnvahI7EzUJXE80X3XPWjjDD/6f9BPmZ7S97Lstuhw=";
+    hash = "sha256-3YsYxQ/YE8bdnSQ1gMT/fgE9BHfCe4Z+jgA8tIWS5LE=";
     fetchSubmodules = true;
   };
 

An auto update branch exists with message `circt: 1.147.0 -> 1.149.0`. New version is 1.149.0.
An auto update branch exists with an equal or greater version