anchor.diff:        else
           touch $TMPDIR/buildFlagsArray
         fi
  -      export -f buildGoDir # xargs needs to see the function
         if [ -z "$enableParallelBuilding" ]; then
             export NIX_BUILD_CORES=1
         fi
  -      getGoDirs "" | xargs -n1 -P $NIX_BUILD_CORES bash -c 'buildGoDir install "$@"' --
  +      for pkg in $(getGoDirs ""); do
  +        buildGoDir install "$pkg"
  +      done
       '' + lib.optionalString (stdenv.hostPlatform != stdenv.buildPlatform) ''
         # normalize cross-compiled builds w.r.t. native builds
         (
  
positive.code:         echo "$d" | grep -q "\(/_\|examples\|Godeps\)" && return 0
          [ -n "$excludedPackages" ] && echo "$d" | grep -q "$excludedPackages" && return 0
          local OUT
          if ! OUT="$(go $cmd $buildFlags "''${buildFlagsArray[@]}" -v $d 2>&1)"; then
            if ! echo "$OUT" | grep -qE '(no( buildable| non-test)?|build constraints exclude all) Go (source )?files'; then
              echo "$OUT" >&2
              return 1
  
negative.code:     checkPhase = args.checkPhase or ''
        runHook preCheck
  
        for pkg in $(getGoDirs test); do
          buildGoDir test "$pkg"
        done
  
        runHook postCheck
      '';
  