anchor.diff:          exit 1
         }
         touch $out
  -      ''
  +      '')
         ;
   
     in rec {
  
positive.code:       };
        expectedFiles = [
          "./nix-support/propagated-build-inputs"
          "./lib/libtest_lib-042a1fdbef.rlib"
          "./lib/link"
        ];
      };
  
negative.code:       };
        expectedFiles = [
          "./nix-support/propagated-build-inputs"
          "./lib/libtest_lib-HASH.rlib"
          "./lib/link"
        ];
      };
  