anchor.diff:                      )
             src;
           buildInputs = [ elmPackages.elm ] ++ (builtins.attrValues node_modules);
  +        patchPhase = ''
  +          for item in ./*; do
  +            if [ -h $item ]; then
  +              rm -f $item
  +              cp ${src_elm_common}/`basename $item` ./
  +            fi
  +          done
  +          if [ -d src ]; then
  +            for item in ./src/*; do
  +              if [ -h $item ]; then
  +                rm -f $item
  +                cp ${src_elm_common}/`basename $item` ./src/
  +              fi
  +            done
  +          fi
  +        '' + patchPhase;
           configurePhase = ''
             rm -rf node_modules
             rm -rf elm-stuff
  
positive.code:           cp build/* $out/ -R
            runHook postInstall
          '';
          inherit postInstall patchPhase;
          shellHook = ''
            cd ${src_path}
          '' + self.configurePhase;
  
negative.code:     { name
      , version
      , src
      , src_elm_common
      , src_path ? "src/${name}"
      , node_modules
      , elm_packages
      , patchPhase ? ""
      , postInstall ? null
      }:
      let
  