klipper 0 -> 1
attrpath: klipper
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/q2d7bsm0ysq14c9vgvy3ixhz3y1vgl8j-packages.json.drv
building '/nix/store/q2d7bsm0ysq14c9vgvy3ixhz3y1vgl8j-packages.json.drv'...

Going to be running update for following packages:
 - klipper-unstable-2023-11-16

Press Enter key to continue...
Running update for:
 - klipper-unstable-2023-11-16: UPDATING ...
 - klipper-unstable-2023-11-16: DONE.

Packages updated!


[quotedUrls]
[quotedUrls] nothing found to replace
Diff after rewrites:
diff --git a/pkgs/servers/klipper/default.nix b/pkgs/servers/klipper/default.nix
index 13fa39fe828c..0d0ea8f6b8f4 100644
--- a/pkgs/servers/klipper/default.nix
+++ b/pkgs/servers/klipper/default.nix
@@ -8,13 +8,13 @@
 
 stdenv.mkDerivation rec {
   pname = "klipper";
-  version = "unstable-2023-11-16";
+  version = "unstable-2023-12-11";
 
   src = fetchFromGitHub {
     owner = "KevinOConnor";
     repo = "klipper";
-    rev = "187cc2f1b89e3870d694f8db6a64b116992106b7";
-    sha256 = "sha256-CmnWgX8MvQs/5jQuAR8+1bKM4VsFXF2pV/jme75WJLY=";
+    rev = "6676c1df86e9cb9480b9dd98f77357f69d8ef0d8";
+    sha256 = "sha256-V6ZplUmaWkLYsBadQIF4yIhzFz+4X0zsRf0nBpsP5xA=";
   };
 
   sourceRoot = "${src.name}/klippy";

No auto update branch exists
There might already be an open PR for this update:
- moonraker: unstable-2023-08-03 -> unstable-2023-11-19
  URL "https://api.github.com/repos/NixOS/nixpkgs/issues/202276"