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 'ghc-shell-for-packages'
         whose name attribute is located at /nix/store/apn339kmg5xllk224ghr7cw6468pgkc7-source/pkgs/stdenv/generic/make-derivation.nix:300:7

       … while evaluating attribute 'shellHook' of derivation 'ghc-shell-for-packages'

         at /nix/store/zbijw20hwyi74m5gzz7l5vs2x6ldyjpf-source/src/core/mkHaskellProject.nix:105:9:

          104|         buildInputs = attrs.buildInputs ++ iogx-shell.buildInputs;
          105|         shellHook = "${attrs.shellHook}\n${iogx-shell.shellHook}";
             |         ^
          106|       });

       … from call site

         at /nix/store/zbijw20hwyi74m5gzz7l5vs2x6ldyjpf-source/src/core/mkMergedShellProfiles.nix:33:10:

           32|       lib.concatStringsSep "\n" [
           33|         (utils.getAttrWithDefault "shellHook" "" p1)
             |          ^
           34|         (utils.getAttrWithDefault "shellHook" "" p2)

       … while calling 'getAttrWithDefault'

         at /nix/store/zbijw20hwyi74m5gzz7l5vs2x6ldyjpf-source/src/lib/utils.nix:51:37:

           50|     # Is this not in the stdlib?
           51|     getAttrWithDefault = name: def: set:
             |                                     ^
           52|       if l.hasAttr name set then

       … from call site

         at /nix/store/zbijw20hwyi74m5gzz7l5vs2x6ldyjpf-source/src/core/mkMergedShellProfiles.nix:34:10:

           33|         (utils.getAttrWithDefault "shellHook" "" p1)
           34|         (utils.getAttrWithDefault "shellHook" "" p2)
             |          ^
           35|       ];

       … while calling 'getAttrWithDefault'

         at /nix/store/zbijw20hwyi74m5gzz7l5vs2x6ldyjpf-source/src/lib/utils.nix:51:37:

           50|     # Is this not in the stdlib?
           51|     getAttrWithDefault = name: def: set:
             |                                     ^
           52|       if l.hasAttr name set then

       … from call site

         at /nix/store/zbijw20hwyi74m5gzz7l5vs2x6ldyjpf-source/src/core/mkMergedShellProfiles.nix:33:10:

           32|       lib.concatStringsSep "\n" [
           33|         (utils.getAttrWithDefault "shellHook" "" p1)
             |          ^
           34|         (utils.getAttrWithDefault "shellHook" "" p2)

       … while calling 'getAttrWithDefault'

         at /nix/store/zbijw20hwyi74m5gzz7l5vs2x6ldyjpf-source/src/lib/utils.nix:51:37:

           50|     # Is this not in the stdlib?
           51|     getAttrWithDefault = name: def: set:
             |                                     ^
           52|       if l.hasAttr name set then

       … from call site

         at /nix/store/zbijw20hwyi74m5gzz7l5vs2x6ldyjpf-source/src/core/mkMergedShellProfiles.nix:33:10:

           32|       lib.concatStringsSep "\n" [
           33|         (utils.getAttrWithDefault "shellHook" "" p1)
             |          ^
           34|         (utils.getAttrWithDefault "shellHook" "" p2)

       … while calling 'getAttrWithDefault'

         at /nix/store/zbijw20hwyi74m5gzz7l5vs2x6ldyjpf-source/src/lib/utils.nix:51:37:

           50|     # Is this not in the stdlib?
           51|     getAttrWithDefault = name: def: set:
             |                                     ^
           52|       if l.hasAttr name set then

       … from call site

         at /nix/store/zbijw20hwyi74m5gzz7l5vs2x6ldyjpf-source/src/core/mkMergedShellProfiles.nix:33:10:

           32|       lib.concatStringsSep "\n" [
           33|         (utils.getAttrWithDefault "shellHook" "" p1)
             |          ^
           34|         (utils.getAttrWithDefault "shellHook" "" p2)

       … while calling 'getAttrWithDefault'

         at /nix/store/zbijw20hwyi74m5gzz7l5vs2x6ldyjpf-source/src/lib/utils.nix:51:37:

           50|     # Is this not in the stdlib?
           51|     getAttrWithDefault = name: def: set:
             |                                     ^
           52|       if l.hasAttr name set then

       … from call site

         at /nix/store/zbijw20hwyi74m5gzz7l5vs2x6ldyjpf-source/src/core/mkMergedShellProfiles.nix:34:10:

           33|         (utils.getAttrWithDefault "shellHook" "" p1)
           34|         (utils.getAttrWithDefault "shellHook" "" p2)
             |          ^
           35|       ];

       … while calling 'getAttrWithDefault'

         at /nix/store/zbijw20hwyi74m5gzz7l5vs2x6ldyjpf-source/src/lib/utils.nix:51:37:

           50|     # Is this not in the stdlib?
           51|     getAttrWithDefault = name: def: set:
             |                                     ^
           52|       if l.hasAttr name set then

       … while calling anonymous lambda

         at /nix/store/apn339kmg5xllk224ghr7cw6468pgkc7-source/lib/attrsets.nix:816:24:

          815|     let f = attrPath:
          816|       zipAttrsWith (n: values:
             |                        ^
          817|         let here = attrPath ++ [n]; in

       … while calling 'g'

         at /nix/store/apn339kmg5xllk224ghr7cw6468pgkc7-source/lib/attrsets.nix:599:19:

          598|           g =
          599|             name: value:
             |                   ^
          600|             if isAttrs value && cond value

       … from call site

         at /nix/store/apn339kmg5xllk224ghr7cw6468pgkc7-source/lib/attrsets.nix:602:20:

          601|               then recurse (path ++ [name]) value
          602|               else f (path ++ [name]) value;
             |                    ^
          603|         in mapAttrs g;

       … while calling anonymous lambda

         at /nix/store/apn339kmg5xllk224ghr7cw6468pgkc7-source/lib/modules.nix:242:72:

          241|           # For definitions that have an associated option
          242|           declaredConfig = mapAttrsRecursiveCond (v: ! isOption v) (_: v: v.value) options;
             |                                                                        ^
          243|

       … while evaluating the option `"mkShell.<in>".shellHook':

       … while calling anonymous lambda

         at /nix/store/apn339kmg5xllk224ghr7cw6468pgkc7-source/lib/modules.nix:815:28:

          814|         # Process mkMerge and mkIf properties.
          815|         defs' = concatMap (m:
             |                            ^
          816|           map (value: { inherit (m) file; inherit value; }) (builtins.addErrorContext "while evaluating definitions from `${m.file}':" (dischargeProperties m.value))

       … while evaluating definitions from `<unknown-file>':

       … from call site

         at /nix/store/apn339kmg5xllk224ghr7cw6468pgkc7-source/lib/modules.nix:816:137:

          815|         defs' = concatMap (m:
          816|           map (value: { inherit (m) file; inherit value; }) (builtins.addErrorContext "while evaluating definitions from `${m.file}':" (dischargeProperties m.value))
             |                                                                                                                                         ^
          817|         ) defs;

       … while calling 'dischargeProperties'

         at /nix/store/apn339kmg5xllk224ghr7cw6468pgkc7-source/lib/modules.nix:887:25:

          886|   */
          887|   dischargeProperties = def:
             |                         ^
          888|     if def._type or "" == "merge" then

       … while calling anonymous lambda

         at /nix/store/apn339kmg5xllk224ghr7cw6468pgkc7-source/lib/attrsets.nix:816:24:

          815|     let f = attrPath:
          816|       zipAttrsWith (n: values:
             |                        ^
          817|         let here = attrPath ++ [n]; in

       error: 1 dependencies of derivation '/nix/store/m3gf6f0raz3gzcfkdkla5azal4flxhjx-cert-env.drv' failed to build