error:
       … while calling the 'getAttr' builtin

         at /builtin/derivation.nix:19:19: (source not available)

       … while calling the 'derivationStrict' builtin

         at /builtin/derivation.nix:9:12: (source not available)

       … while evaluating derivation 'gc-root'
         whose name attribute is located at /nix/store/d5hgy42a104xh2ajkrfy5i3gl9425v45-nixpkgs-src/pkgs/stdenv/generic/make-derivation.nix:205:7

       … while evaluating attribute 'cardanoBridgeInputs' of derivation 'gc-root'

         at /nix/store/502y71liykv1lcqklgg0fax2q8pcpqkr-source/shell.nix:84:5:

           83|     # cardano-bridge inputs are GC’d, and rebuilt too often on Apple M1 CI:
           84|     cardanoBridgeInputs = builtins.map (attr: if daedalusPkgs ? ${attr} && pkgs.lib.isDerivation daedalusPkgs.${attr} then daedalusPkgs.${attr} else null) (builtins.attrNames (builtins.functionArgs (import ./nix/cardano-bridge.nix)));
             |     ^
           85|   } "export >$out";

       … while calling anonymous lambda

         at /nix/store/502y71liykv1lcqklgg0fax2q8pcpqkr-source/shell.nix:84:41:

           83|     # cardano-bridge inputs are GC’d, and rebuilt too often on Apple M1 CI:
           84|     cardanoBridgeInputs = builtins.map (attr: if daedalusPkgs ? ${attr} && pkgs.lib.isDerivation daedalusPkgs.${attr} then daedalusPkgs.${attr} else null) (builtins.attrNames (builtins.functionArgs (import ./nix/cardano-bridge.nix)));
             |                                         ^
           85|   } "export >$out";

       … from call site

         at /nix/store/502y71liykv1lcqklgg0fax2q8pcpqkr-source/shell.nix:84:76:

           83|     # cardano-bridge inputs are GC’d, and rebuilt too often on Apple M1 CI:
           84|     cardanoBridgeInputs = builtins.map (attr: if daedalusPkgs ? ${attr} && pkgs.lib.isDerivation daedalusPkgs.${attr} then daedalusPkgs.${attr} else null) (builtins.attrNames (builtins.functionArgs (import ./nix/cardano-bridge.nix)));
             |                                                                            ^
           85|   } "export >$out";

       … while calling 'isDerivation'

         at /nix/store/d5hgy42a104xh2ajkrfy5i3gl9425v45-nixpkgs-src/lib/attrsets.nix:330:18:

          329|   */
          330|   isDerivation = x: isAttrs x && x ? type && x.type == "derivation";
             |                  ^
          331|

       … from call site

         at /nix/store/xbj4lqck18yww2bkpzdsia0xliawa9zn-source/overlays/haskell.nix:513:27:

          512|               callProjectResults = callCabalProjectToNix args;
          513|               plan-pkgs = importAndFilterProject {
             |                           ^
          514|                 inherit (callProjectResults) projectNix sourceRepos src;

       … while calling anonymous lambda

         at /nix/store/xbj4lqck18yww2bkpzdsia0xliawa9zn-source/lib/import-and-filter-project.nix:5:1:

            4| { pkgs, haskellLib }:
            5| { projectNix, sourceRepos, src }:
             | ^
            6| let

       error: 1 dependencies of derivation '/nix/store/qyw0qfc6hvki95dc8wkaafcwh34drhr8-cardano-wallet-plan-to-nix-pkgs.drv' failed to build