Output path comparison

nix-env failed:
error:
       … while calling anonymous lambda

         at /ofborg/checkout/2/repo/38dca4e3aa6bca43ea96d2fcc04e8229/mr-est/ofborg-evaluator-4/.gc-of-borg-outpaths.nix:48:12:

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

       … from call site

         at /ofborg/checkout/2/repo/38dca4e3aa6bca43ea96d2fcc04e8229/mr-est/ofborg-evaluator-4/lib/attrsets.nix:1248:43:

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

       … while calling anonymous lambda

         at /ofborg/checkout/2/repo/38dca4e3aa6bca43ea96d2fcc04e8229/mr-est/ofborg-evaluator-4/pkgs/top-level/release-lib.nix:146:6:

          145|   testOnCross = crossSystem: metaPatterns: f: forMatchingSystems metaPatterns
          146|     (system: hydraJob' (f (pkgsForCross crossSystem system)));
             |      ^
          147|

       … from call site

         at /ofborg/checkout/2/repo/38dca4e3aa6bca43ea96d2fcc04e8229/mr-est/ofborg-evaluator-4/pkgs/top-level/release-lib.nix:146:14:

          145|   testOnCross = crossSystem: metaPatterns: f: forMatchingSystems metaPatterns
          146|     (system: hydraJob' (f (pkgsForCross crossSystem system)));
             |              ^
          147|

       … while calling 'hydraJob'

         at /ofborg/checkout/2/repo/38dca4e3aa6bca43ea96d2fcc04e8229/mr-est/ofborg-evaluator-4/lib/customisation.nix:388:14:

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

       … while evaluating derivation 'otree-0.2.0'
         whose name attribute is located at /ofborg/checkout/2/repo/38dca4e3aa6bca43ea96d2fcc04e8229/mr-est/ofborg-evaluator-4/pkgs/stdenv/generic/make-derivation.nix:331:7

       … while evaluating attribute 'cargoDeps' of derivation 'otree-0.2.0'

         at /ofborg/checkout/2/repo/38dca4e3aa6bca43ea96d2fcc04e8229/mr-est/ofborg-evaluator-4/pkgs/build-support/rust/build-rust-package/default.nix:101:10:

          100| } // {
          101|   inherit buildAndTestSubdir cargoDeps;
             |          ^
          102|

       … while evaluating derivation 'cargo-vendor-dir'
         whose name attribute is located at /ofborg/checkout/2/repo/38dca4e3aa6bca43ea96d2fcc04e8229/mr-est/ofborg-evaluator-4/pkgs/stdenv/generic/make-derivation.nix:331:7

       … while evaluating attribute 'buildCommand' of derivation 'cargo-vendor-dir'

         at /ofborg/checkout/2/repo/38dca4e3aa6bca43ea96d2fcc04e8229/mr-est/ofborg-evaluator-4/pkgs/build-support/trivial-builders/default.nix:68:16:

           67|         enableParallelBuilding = true;
           68|         inherit buildCommand name;
             |                ^
           69|         passAsFile = [ "buildCommand" ]

       … from call site

         at /ofborg/checkout/2/repo/38dca4e3aa6bca43ea96d2fcc04e8229/mr-est/ofborg-evaluator-4/pkgs/build-support/rust/import-cargo-lock.nix:82:22:

           81|   # individually.
           82|   gitShaOutputHash = lib.mapAttrs' (nameVer: hash:
             |                      ^
           83|     let

       … while calling 'mapAttrs''

         at /ofborg/checkout/2/repo/38dca4e3aa6bca43ea96d2fcc04e8229/mr-est/ofborg-evaluator-4/lib/attrsets.nix:1057:5:

         1056|     f:
         1057|     set:
             |     ^
         1058|     listToAttrs (map (attr: f attr set.${attr}) (attrNames set));

       error: path '/nix/store/gma89bdvga8qqfmr3hwxjmbppimva1fi-source.drv' is not valid