Running nixpkgs-update (https://nix-community.org/update-bot/) with UPDATE_INFO: codon 0.16.1 -> 0.19.4 https://github.com/exaloop/codon/releases
attrpath: codon
Checking auto update branch...
[version] 
[version] generic version rewriter does not support multiple hashes
[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/q6gl8lvpva3ff5lpylc99qi1yqmbgnis-packages.json.drv
building '/nix/store/q6gl8lvpva3ff5lpylc99qi1yqmbgnis-packages.json.drv'...

Going to be running update for following packages:
 - codon-0.16.1

Press Enter key to continue...
Running update for:
Enqueuing group of 1 packages
 - codon-0.16.1: UPDATING ...
 - codon-0.16.1: DONE.

Packages updated!

Diff after rewrites:
diff --git a/pkgs/development/compilers/codon/default.nix b/pkgs/development/compilers/codon/default.nix
index 491f38f2606a..22c5efcd7a7c 100644
--- a/pkgs/development/compilers/codon/default.nix
+++ b/pkgs/development/compilers/codon/default.nix
@@ -13,13 +13,13 @@
 }:
 
 let
-  version = "0.16.1";
+  version = "0.19.4";
 
   src = fetchFromGitHub {
     owner = "exaloop";
     repo = "codon";
     rev = "v${version}";
-    hash = "sha256-s2GqiFcekXRts8BU5CSmTrkFZ9xLqq4A5MybhB1o1Gg=";
+    hash = "sha256-ETuxd0Wl4XpAC3Pyon76/tZ/+UZYW7owXYlsjL3Fk9E=";
   };
 
   depsDir = "deps";

No auto update branch exists
Received ExitFailure 1 when running
Raw command: nix-build --option sandbox true --arg config "{ allowUnfree = true; allowAliases = false; }" --arg overlays "[ ]" -A codon
Received ExitFailure 1 when running
Raw command: nix --extra-experimental-features nix-command log -f . codon --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/codon/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/codon/pkgs/stdenv/generic/check-meta.nix:737:9:
          736|         valid = "no";
          737|         handled = handled;
             |         ^
          738|       };

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

       error: Package ‘codon-0.19.4’ in /var/cache/nixpkgs-update/worker/worktree/codon/pkgs/development/compilers/codon/default.nix:136 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.