error:
       … while evaluating the attribute 'optionalValue.value'
         at «github:nixos/nixpkgs/0ae2bc1419c3f345984c2629e72e7a631820fa4d?narHash=sha256-vXNVDVtvfiQuXthP0NHPFdNvvMTkGpx0UP8oddIWbNk%3D»/lib/modules.nix:1312:5:
         1311|
         1312|     optionalValue = if isDefined then { value = mergedValue; } else { };
             |     ^
         1313|   };

       … while evaluating a branch condition
         at «github:nixos/nixpkgs/0ae2bc1419c3f345984c2629e72e7a631820fa4d?narHash=sha256-vXNVDVtvfiQuXthP0NHPFdNvvMTkGpx0UP8oddIWbNk%3D»/lib/modules.nix:1312:21:
         1311|
         1312|     optionalValue = if isDefined then { value = mergedValue; } else { };
             |                     ^
         1313|   };

       … while evaluating definitions from `/nix/store/lrxvs4l9bqbgjfz7w9bkfg5zqq442jxc-source/modules/transposition.nix':

       … while evaluating definitions from `/nix/store/l2sinkkmq8qy4whb470x6l5izlmdwdah-source/parts/ci.nix, via option perSystem':

       … while evaluating the option `system.build.toplevel':

       … while evaluating definitions from `/nix/store/wswvrdgsdx3zq9gy1mqnbqnvdh087bbn-source/nixos/modules/system/activation/top-level.nix':

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

       error:
       Failed assertions:
       - The option definition `services.nixbot.github.oauthPrivateRepoScope' in `/nix/store/l2sinkkmq8qy4whb470x6l5izlmdwdah-source/hosts/makai/services/nixbot.nix' no longer has any effect; please remove it.
       Private-repo visibility is now determined with nixbot's own forge
       credentials instead of the user's login token, so the write-capable
       "repo" OAuth scope is no longer requested.