error:
       … from call site

         at /nix/store/p7iz0r8gs6ppkhj83zjmwyd21k8b7v3y-source/lib/attrsets.nix:622:43:

          621|     f:
          622|     listToAttrs (map (n: nameValuePair n (f n)) names);
             |                                           ^
          623|

       … while calling anonymous lambda

         at /nix/store/bm9rpyyx34rmq1hlkcsanifddr5pd5sq-source/nix/builder.nix:10:34:

            9| # invocations.
           10| compiler-nix-name: package-name: package-version:
             |                                  ^
           11| let

       … from call site

         at /nix/store/bm9rpyyx34rmq1hlkcsanifddr5pd5sq-source/nix/builder.nix:104:1:

          103| in
          104| mkJob project
             | ^
          105|

       … while calling 'mkJob'

         at /nix/store/bm9rpyyx34rmq1hlkcsanifddr5pd5sq-source/nix/builder.nix:65:11:

           64|   # result.
           65|   mkJob = project:
             |           ^
           66|     let

       … from call site

         at /nix/store/bm9rpyyx34rmq1hlkcsanifddr5pd5sq-source/nix/builder.nix:69:9:

           68|       components =
           69|         haskellLib.mkFlakePackages
             |         ^
           70|           { ${package-name} = project.hsPkgs.${package-name}; };

       … while calling 'foldrAttrVals'

         at /nix/store/k76r4jv7j6443lbvl8ygsp5iy4h0ybrj-source/lib/default.nix:37:25:

           36|
           37|   foldrAttrVals = f: z: attrs:
             |                         ^
           38|     lib.foldr f z (builtins.attrValues attrs);

       … from call site

         at /nix/store/k76r4jv7j6443lbvl8ygsp5iy4h0ybrj-source/lib/default.nix:38:5:

           37|   foldrAttrVals = f: z: attrs:
           38|     lib.foldr f z (builtins.attrValues attrs);
             |     ^
           39|

       … while calling 'foldr'

         at /nix/store/p7iz0r8gs6ppkhj83zjmwyd21k8b7v3y-source/lib/lists.nix:53:20:

           52|   */
           53|   foldr = op: nul: list:
             |                    ^
           54|     let

       … from call site

         at /nix/store/p7iz0r8gs6ppkhj83zjmwyd21k8b7v3y-source/lib/lists.nix:60:8:

           59|         else op (elemAt list n) (fold' (n + 1));
           60|     in fold' 0;
             |        ^
           61|

       … while calling 'fold''

         at /nix/store/p7iz0r8gs6ppkhj83zjmwyd21k8b7v3y-source/lib/lists.nix:56:15:

           55|       len = length list;
           56|       fold' = n:
             |               ^
           57|         if n == len

       … from call site

         at /nix/store/p7iz0r8gs6ppkhj83zjmwyd21k8b7v3y-source/lib/lists.nix:59:14:

           58|         then nul
           59|         else op (elemAt list n) (fold' (n + 1));
             |              ^
           60|     in fold' 0;

       … while calling anonymous lambda

         at /nix/store/k76r4jv7j6443lbvl8ygsp5iy4h0ybrj-source/lib/default.nix:432:17:

          431|     foldrAttrVals
          432|       (package: acc:
             |                 ^
          433|         foldComponents

       … from call site

         at /nix/store/k76r4jv7j6443lbvl8ygsp5iy4h0ybrj-source/lib/default.nix:433:9:

          432|       (package: acc:
          433|         foldComponents
             |         ^
          434|           subComponentTypes

       … while calling 'foldComponents'

         at /nix/store/k76r4jv7j6443lbvl8ygsp5iy4h0ybrj-source/lib/default.nix:40:31:

           39|
           40|   foldComponents = tys: f: z: conf:
             |                               ^
           41|     let

       … from call site

         at /nix/store/k76r4jv7j6443lbvl8ygsp5iy4h0ybrj-source/lib/default.nix:52:5:

           51|     in
           52|     libComp (subComps z);
             |     ^
           53|

       … while calling 'libComp'

         at /nix/store/k76r4jv7j6443lbvl8ygsp5iy4h0ybrj-source/lib/default.nix:44:17:

           43|       # ensure that comps.library exists and is not null.
           44|       libComp = acc:
             |                 ^
           45|         if comps ? library then f comps.library acc else acc;

       … from call site

         at /nix/store/k76r4jv7j6443lbvl8ygsp5iy4h0ybrj-source/overlays/haskell.nix:658:27:

          657|               callProjectResults = callCabalProjectToNix config;
          658|               plan-pkgs = importAndFilterProject {
             |                           ^
          659|                 inherit (callProjectResults) projectNix sourceRepos src;

       … while calling anonymous lambda

         at /nix/store/k76r4jv7j6443lbvl8ygsp5iy4h0ybrj-source/lib/import-and-filter-project.nix:5:1:

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

       error: builder for '/nix/store/mjnkbnn891zz5pizlvkvd11jy3bs307n-ouroboros-consensus-cardano-0.12.0.0-plan-to-nix-pkgs.drv' failed with exit code 1;
       last 10 log lines:
       > base-3.0.3.2, base-3.0.3.1 (has the same characteristics that caused the
       > previous version to fail: excluded by constraint '<0 && >=4.10 && <5' from
       > 'text')
       > [__5] fail (backjumping, conflict set: base, ouroboros-consensus-cardano,
       > text)
       > After searching the rest of the dependency tree exhaustively, these were the
       > goals I've had most trouble fulfilling: text, ouroboros-consensus-cardano,
       > base, aeson, cardano-ledger-shelley, integer-conversion
       > Try running with --minimize-conflict-set to improve the error message.
       > )
       For full logs, run 'nix log /nix/store/mjnkbnn891zz5pizlvkvd11jy3bs307n-ouroboros-consensus-cardano-0.12.0.0-plan-to-nix-pkgs.drv'.