Output path comparison

nix-env failed:
error:
       … while evaluating call site

       at «none»:0: (source not available)

       … while calling anonymous lambda

       at /ofborg/checkout/1/repo/38dca4e3aa6bca43ea96d2fcc04e8229/mr-est/ofborg-evaluator-1/.gc-of-borg-outpaths.nix:48:12:

           47|   tweak = lib.mapAttrs
           48|     (name: val:
             |            ^
           49|       if name == "recurseForDerivations" then true

       … while evaluating call site

       at /ofborg/checkout/1/repo/38dca4e3aa6bca43ea96d2fcc04e8229/mr-est/ofborg-evaluator-1/lib/attrsets.nix:1248:43:

         1247|     f:
         1248|     listToAttrs (map (n: nameValuePair n (f n)) names);
             |                                           ^
         1249|

       … while calling anonymous lambda

       at /ofborg/checkout/1/repo/38dca4e3aa6bca43ea96d2fcc04e8229/mr-est/ofborg-evaluator-1/pkgs/top-level/release-lib.nix:145:6:

          144|   testOnCross = crossSystem: metaPatterns: f: forMatchingSystems metaPatterns
          145|     (system: hydraJob' (f (pkgsForCross crossSystem system)));
             |      ^
          146|

       … while evaluating call site

       at /ofborg/checkout/1/repo/38dca4e3aa6bca43ea96d2fcc04e8229/mr-est/ofborg-evaluator-1/pkgs/top-level/release-lib.nix:145:14:

          144|   testOnCross = crossSystem: metaPatterns: f: forMatchingSystems metaPatterns
          145|     (system: hydraJob' (f (pkgsForCross crossSystem system)));
             |              ^
          146|

       … while calling 'hydraJob'

       at /ofborg/checkout/1/repo/38dca4e3aa6bca43ea96d2fcc04e8229/mr-est/ofborg-evaluator-1/lib/customisation.nix:388:14:

          387|   */
          388|   hydraJob = drv:
             |              ^
          389|     let

       … while evaluating the attribute 'meta'

       at /ofborg/checkout/1/repo/38dca4e3aa6bca43ea96d2fcc04e8229/mr-est/ofborg-evaluator-1/lib/customisation.nix:393:24:

          392|       commonAttrs =
          393|         { inherit (drv) name system meta; inherit outputs; }
             |                        ^
          394|         // optionalAttrs (drv._hydraAggregate or false) {

       … while evaluating the attribute 'maintainers'

       at /ofborg/checkout/1/repo/38dca4e3aa6bca43ea96d2fcc04e8229/mr-est/ofborg-evaluator-1/pkgs/by-name/so/soundconverter/package.nix:112:5:

          111|     platforms = platforms.linux;
          112|     maintainers = with maintainers; [
             |     ^
          113|       jakubgs

       error: undefined variable 'pyrox0'

       at /ofborg/checkout/1/repo/38dca4e3aa6bca43ea96d2fcc04e8229/mr-est/ofborg-evaluator-1/pkgs/by-name/so/soundconverter/package.nix:114:7:

          113|       jakubgs
          114|       pyrox0
             |       ^
          115|     ];