Running nixpkgs-update (https://nix-community.org/update-bot/) with UPDATE_INFO: cantus 0.6.6 -> 0.6.7 https://github.com/CodedNil/cantus/releases
attrpath: cantus
Checking auto update branch...
[version] 
[version] generic version rewriter does not support multiple hashes
[rustCrateVersion] 
[rustCrateVersion] skipping because derivation has updateScript
[golangModuleVersion] 
[golangModuleVersion] Not a buildGoModule package with vendorHash
[npmDepsVersion] 
[npmDepsVersion] No npmDepsHash
[updateScript] 
[updateScript] Success
[updateScript] this derivation will be built:
  /nix/store/9a9i6b0gy9bnsd5jpjxdcig63h5cyfii-packages.json.drv
building '/nix/store/9a9i6b0gy9bnsd5jpjxdcig63h5cyfii-packages.json.drv'...

Going to be running update for following packages:
 - cantus-0.6.6

Press Enter key to continue...
Running update for:
Enqueuing group of 1 packages
 - cantus-0.6.6: UPDATING ...
 - cantus-0.6.6: DONE.

Packages updated!

Diff after rewrites:
diff --git a/pkgs/by-name/ca/cantus/package.nix b/pkgs/by-name/ca/cantus/package.nix
index 8efe5ba30b2a..d431fe2ddd57 100644
--- a/pkgs/by-name/ca/cantus/package.nix
+++ b/pkgs/by-name/ca/cantus/package.nix
@@ -12,16 +12,16 @@
 }:
 rustPlatform.buildRustPackage (finalAttrs: {
   pname = "cantus";
-  version = "0.6.6";
+  version = "0.6.7";
 
   src = fetchFromGitHub {
     owner = "CodedNil";
     repo = "cantus";
     tag = finalAttrs.version;
-    hash = "sha256-4bnIYOHVOPawDg4s5mPKYXURpDSVgyTmoh1WiGj/Zl8=";
+    hash = "sha256-JoxGn3AaILLW2vWwPZ06Dr+JF0Cc1P0X7BeJBNGJBuI=";
   };
 
-  cargoHash = "sha256-TbbXZGToQTH0k6KxpCsjcG/kOFY0c4L/P8QUpDyQ+2E=";
+  cargoHash = "sha256-GIB/QWBjlpkyxeTz15Hf4mr660R++mSf1J+K4JZ+YXY=";
 
   nativeBuildInputs = [
     pkg-config

No auto update branch exists
There might already be an open PR for this update:
- cantus: 0.6.6 -> 0.6.7
  URL "https://api.github.com/repos/NixOS/nixpkgs/issues/522981"