Output path comparison

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

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

       … while calling anonymous lambda

       at /ofborg/checkout/3/repo/38dca4e3aa6bca43ea96d2fcc04e8229/mr-est/ofborg-evaluator-0/.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/3/repo/38dca4e3aa6bca43ea96d2fcc04e8229/mr-est/ofborg-evaluator-0/lib/attrsets.nix:1248:43:

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

       … while calling anonymous lambda

       at /ofborg/checkout/3/repo/38dca4e3aa6bca43ea96d2fcc04e8229/mr-est/ofborg-evaluator-0/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/3/repo/38dca4e3aa6bca43ea96d2fcc04e8229/mr-est/ofborg-evaluator-0/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/3/repo/38dca4e3aa6bca43ea96d2fcc04e8229/mr-est/ofborg-evaluator-0/lib/customisation.nix:388:14:

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

       … while evaluating the attribute 'outPath'

       at /ofborg/checkout/3/repo/38dca4e3aa6bca43ea96d2fcc04e8229/mr-est/ofborg-evaluator-0/lib/customisation.nix:404:13:

          403|           value = commonAttrs // {
          404|             outPath = output.outPath;
             |             ^
          405|             drvPath = output.drvPath;

       … while evaluating the attribute 'outPath'

       at /ofborg/checkout/3/repo/38dca4e3aa6bca43ea96d2fcc04e8229/mr-est/ofborg-evaluator-0/lib/customisation.nix:352:13:

          351|             drvPath = assert condition; drv.${outputName}.drvPath;
          352|             outPath = assert condition; drv.${outputName}.outPath;
             |             ^
          353|           } //

       … while evaluating the attribute 'installPhase' of the derivation 'hid-fanatecff-0.1.0'

       at /ofborg/checkout/3/repo/38dca4e3aa6bca43ea96d2fcc04e8229/mr-est/ofborg-evaluator-0/pkgs/stdenv/generic/make-derivation.nix:331:7:

          330|     // (optionalAttrs (attrs ? name || (attrs ? pname && attrs ? version)) {
          331|       name =
             |       ^
          332|         let

       … while evaluating the attribute 'postFetch' of the derivation 'source'

       at /ofborg/checkout/3/repo/38dca4e3aa6bca43ea96d2fcc04e8229/mr-est/ofborg-evaluator-0/pkgs/stdenv/generic/make-derivation.nix:331:7:

          330|     // (optionalAttrs (attrs ? name || (attrs ? pname && attrs ? version)) {
          331|       name =
             |       ^
          332|         let

       error: cannot coerce a function to a string

       at /ofborg/checkout/3/repo/38dca4e3aa6bca43ea96d2fcc04e8229/mr-est/ofborg-evaluator-0/pkgs/build-support/fetchgithub/default.nix:58:33:

           57|     else {
           58|       url = "${baseUrl}/archive/${rev}.tar.gz";
             |                                 ^
           59|