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-3/.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-3/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-3/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-3/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-3/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-3/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-3/lib/customisation.nix:352:13:

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

       … while evaluating the attribute 'nativeBuildInputs' of the derivation 'cros-ectool'

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

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

       … while evaluating call site

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

       … while calling anonymous lambda

       at /ofborg/checkout/3/repo/38dca4e3aa6bca43ea96d2fcc04e8229/mr-est/ofborg-evaluator-3/pkgs/stdenv/generic/make-derivation.nix:302:13:

          301|       (map (drv: getDev drv.__spliced.buildBuild or drv) (checkDependencyList "depsBuildBuild" depsBuildBuild))
          302|       (map (drv: getDev drv.__spliced.buildHost or drv) (checkDependencyList "nativeBuildInputs" nativeBuildInputs'))
             |             ^
          303|       (map (drv: getDev drv.__spliced.buildTarget or drv) (checkDependencyList "depsBuildTarget" depsBuildTarget))

       … while evaluating call site

       at /ofborg/checkout/3/repo/38dca4e3aa6bca43ea96d2fcc04e8229/mr-est/ofborg-evaluator-3/pkgs/stdenv/generic/make-derivation.nix:302:18:

          301|       (map (drv: getDev drv.__spliced.buildBuild or drv) (checkDependencyList "depsBuildBuild" depsBuildBuild))
          302|       (map (drv: getDev drv.__spliced.buildHost or drv) (checkDependencyList "nativeBuildInputs" nativeBuildInputs'))
             |                  ^
          303|       (map (drv: getDev drv.__spliced.buildTarget or drv) (checkDependencyList "depsBuildTarget" depsBuildTarget))

       … while calling 'getOutput'

       at /ofborg/checkout/3/repo/38dca4e3aa6bca43ea96d2fcc04e8229/mr-est/ofborg-evaluator-3/lib/attrsets.nix:1796:23:

         1795|   */
         1796|   getOutput = output: pkg:
             |                       ^
         1797|     if ! pkg ? outputSpecified || ! pkg.outputSpecified

       … while evaluating call site

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

       … while calling anonymous lambda

       at /ofborg/checkout/3/repo/38dca4e3aa6bca43ea96d2fcc04e8229/mr-est/ofborg-evaluator-3/lib/lists.nix:334:29:

          333|   */
          334|   imap1 = f: list: genList (n: f (n + 1) (elemAt list n)) (length list);
             |                             ^
          335|

       … while evaluating call site

       at /ofborg/checkout/3/repo/38dca4e3aa6bca43ea96d2fcc04e8229/mr-est/ofborg-evaluator-3/lib/lists.nix:334:32:

          333|   */
          334|   imap1 = f: list: genList (n: f (n + 1) (elemAt list n)) (length list);
             |                                ^
          335|

       … while calling anonymous lambda

       at /ofborg/checkout/3/repo/38dca4e3aa6bca43ea96d2fcc04e8229/mr-est/ofborg-evaluator-3/pkgs/stdenv/generic/make-derivation.nix:276:15:

          275|     imap1
          276|       (index: dep:
             |               ^
          277|         if isDerivation dep || dep == null || builtins.isString dep || builtins.isPath dep then dep

       … while evaluating call site

       at /ofborg/checkout/3/repo/38dca4e3aa6bca43ea96d2fcc04e8229/mr-est/ofborg-evaluator-3/pkgs/stdenv/generic/make-derivation.nix:277:12:

          276|       (index: dep:
          277|         if isDerivation dep || dep == null || builtins.isString dep || builtins.isPath dep then dep
             |            ^
          278|         else if isList dep then checkDependencyList' ([index] ++ positions) name dep

       … while calling 'isDerivation'

       at /ofborg/checkout/3/repo/38dca4e3aa6bca43ea96d2fcc04e8229/mr-est/ofborg-evaluator-3/lib/attrsets.nix:1283:5:

         1282|   isDerivation =
         1283|     value: value.type or null == "derivation";
             |     ^
         1284|

       error: undefined variable 'libusb'

       at /ofborg/checkout/3/repo/38dca4e3aa6bca43ea96d2fcc04e8229/mr-est/ofborg-evaluator-3/pkgs/by-name/cr/cros-ectool/package.nix:5:59:

            4|   name = "cros-ectool";
            5|   nativeBuildInputs = with pkgs; [ cmake ninja pkg-config libusb libftdi1 ];
             |                                                           ^
            6|   src = pkgs.fetchFromGitLab {