Running nixpkgs-update (https://nix-community.org/update-bot/) with UPDATE_INFO: fancy-cat 0.4.0 -> 0.5.0 https://repology.org/project/fancy-cat/versions
attrpath: fancy-cat
Checking auto update branch...
No auto update branch exists
[version] 
[version] updated version and sha256
[rustCrateVersion] 
[rustCrateVersion] No cargoHash found
[golangModuleVersion] 
[golangModuleVersion] Not a buildGoModule package with vendorHash
[npmDepsVersion] 
[npmDepsVersion] No npmDepsHash
[updateScript] 
[updateScript] skipping because derivation has no updateScript
Diff after rewrites:
diff --git a/pkgs/by-name/fa/fancy-cat/package.nix b/pkgs/by-name/fa/fancy-cat/package.nix
index f9edf039d3e9..92ed441fc3b0 100644
--- a/pkgs/by-name/fa/fancy-cat/package.nix
+++ b/pkgs/by-name/fa/fancy-cat/package.nix
@@ -16,13 +16,13 @@
 }:
 stdenv.mkDerivation (finalAttrs: {
   pname = "fancy-cat";
-  version = "0.4.0";
+  version = "0.5.0";
 
   src = fetchFromGitHub {
     owner = "freref";
     repo = "fancy-cat";
     tag = "v${finalAttrs.version}";
-    hash = "sha256-Wasxhsv4QhGscOEsGirabsq92963S8v1vOBWvAFuRoM=";
+    hash = "sha256-VR2pNN4+ESWe3MIFAe3sJuHPq7S5XIT6elqCPMDe0GM=";
   };
 
   patches = [ ./0001-changes.patch ];

Received ExitFailure 1 when running
Raw command: nix-build --option sandbox true --arg config "{ allowUnfree = true; allowAliases = false; }" --arg overlays "[ ]" -A fancy-cat
Received ExitFailure 1 when running
Raw command: nix --extra-experimental-features nix-command log -f . fancy-cat --arg config "{ allowUnfree = true; allowAliases = false; }" --arg overlays "[ ]"
Standard output:

error:
       … in the condition of the assert statement
         at /var/cache/nixpkgs-update/worker/worktree/fancy-cat/lib/customisation.nix:447:9:
          446|       drvPath =
          447|         assert condition;
             |         ^
          448|         drv.drvPath;

       … while evaluating the attribute 'handled'
         at /var/cache/nixpkgs-update/worker/worktree/fancy-cat/pkgs/stdenv/generic/check-meta.nix:745:9:
          744|         valid = "no";
          745|         handled = handled;
             |         ^
          746|       };

       (stack trace truncated; use '--show-trace' to show the full, detailed trace)

       error: Package ‘fancy-cat-0.5.0’ in /var/cache/nixpkgs-update/worker/worktree/fancy-cat/pkgs/by-name/fa/fancy-cat/package.nix:54 is marked as broken, refusing to evaluate.

       a) To temporarily allow broken packages, you can use an environment variable
          for a single invocation of the nix tools.

            $ export NIXPKGS_ALLOW_BROKEN=1

          Note: When using `nix shell`, `nix build`, `nix develop`, etc with a flake,
                then pass `--impure` in order to allow use of environment variables.

       b) For `nixos-rebuild` you can set
         { nixpkgs.config.allowBroken = true; }
       in configuration.nix to override this.

       c) For `nix-env`, `nix-build`, `nix-shell` or any other Nix command you can add
         { allowBroken = true; }
       to ~/.config/nixpkgs/config.nix.