anchor.diff: -{ go, govers, parallel, lib, fetchgit, fetchhg, fetchbzr, rsync
  +{ go, govers, lib, fetchgit, fetchhg, fetchbzr, rsync
   , removeReferencesTo, fetchFromGitHub }:
   
   { name, buildInputs ? [], nativeBuildInputs ? [], passthru ? {}, preFixup ? ""
  
positive.code:     else
        touch $TMPDIR/buildFlagsArray
      fi
      export -f buildGoDir # parallel needs to see the function
      if [ -z "$enableParallelBuilding" ]; then
          export NIX_BUILD_CORES=1
      fi
      getGoDirs "" | parallel -j $NIX_BUILD_CORES buildGoDir install
  
      runHook postBuild
    '';
  
negative.code:   checkPhase = args.checkPhase or ''
      runHook preCheck
  
      getGoDirs test | xargs -n1 -P $NIX_BUILD_CORES bash -c 'buildGoDir test "$@"' --
  
      runHook postCheck
    '';
  