mangareader 0 -> 1
attrpath: mangareader
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/br3mj8im0hw5c4hgz28lazxschhc0xxv-packages.json.drv
building '/nix/store/br3mj8im0hw5c4hgz28lazxschhc0xxv-packages.json.drv'...

Going to be running update for following packages:
 - mangareader-2.1.0

Press Enter key to continue...
Running update for:
 - mangareader-2.1.0: UPDATING ...
 - mangareader-2.1.0: DONE.

Packages updated!

Diff after rewrites:
diff --git a/pkgs/applications/graphics/mangareader/default.nix b/pkgs/applications/graphics/mangareader/default.nix
index 37a58ea0ba45..48c2f4f27f89 100644
--- a/pkgs/applications/graphics/mangareader/default.nix
+++ b/pkgs/applications/graphics/mangareader/default.nix
@@ -16,13 +16,13 @@
 
 stdenv.mkDerivation rec {
   pname = "mangareader";
-  version = "2.1.0";
+  version = "2.2.0";
 
   src = fetchFromGitHub {
     owner = "g-fb";
     repo = pname;
     rev = version;
-    hash = "sha256-YZZcp+HS/P/GxWYyOpO35nByJSzv4HahzzrZSVRcCRs=";
+    hash = "sha256-ExmAgw9R1WYXr0uldzRdFk1A26Y9zjFFJze3zvL34+M=";
   };
 
   nativeBuildInputs = [

No auto update branch exists
Received ExitFailure 1 when running
Raw command: /nix/store/cs41wvvf98zsgw7vbpfabj5f8d2y0ihz-nix-2.18.2/bin/nix-build --option sandbox true --arg config "{ allowBroken = true; allowUnfree = true; allowAliases = false; }" --arg overlays "[ ]" -A mangareader
Received ExitFailure 1 when running
Raw command: /nix/store/cs41wvvf98zsgw7vbpfabj5f8d2y0ihz-nix-2.18.2/bin/nix --extra-experimental-features nix-command log -f . mangareader
Standard output:

error:
       … in the condition of the assert statement

         at /var/cache/nixpkgs-update/worker/worktree/mangareader/lib/customisation.nix:268:17:

          267|     in commonAttrs // {
          268|       drvPath = assert condition; drv.drvPath;
             |                 ^
          269|       outPath = assert condition; drv.outPath;

       … while evaluating the attribute 'handled'

         at /var/cache/nixpkgs-update/worker/worktree/mangareader/pkgs/stdenv/generic/check-meta.nix:490:7:

          489|       # or, alternatively, just output a warning message.
          490|       handled =
             |       ^
          491|         (

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

       error: Package ‘mangareader-2.2.0’ in /var/cache/nixpkgs-update/worker/worktree/mangareader/pkgs/applications/graphics/mangareader/default.nix:47 has an unfree license (‘gpl3Plus cc-by-nc-sa-40’), refusing to evaluate.

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

            $ export NIXPKGS_ALLOW_UNFREE=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.allowUnfree = true; }
       in configuration.nix to override this.

       Alternatively you can configure a predicate to allow specific packages:
         { nixpkgs.config.allowUnfreePredicate = pkg: builtins.elem (lib.getName pkg) [
             "mangareader-2.2.0"
           ];
         }

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