anchor.diff:          '';
   
           cleanup = pkgs.writeText "cleanup" ''
  +          . ${./lib-bash/color-echo.sh}
  +
             newGenFiles="$1"
             oldGenFiles="$2"
             shift 2
  
positive.code:             targetPath="$HOME/$relativePath"
              if [[ -e "$newGenFiles/$relativePath" ]] ; then
                $VERBOSE_ECHO "Checking $targetPath  exists"
              else
                echo "Checking $targetPath  gone (deleting)"
                $DRY_RUN_CMD rm $VERBOSE_ARG "$targetPath"
  
negative.code: 
      home.activation.linkGeneration = dagEntryAfter ["writeBoundary"] (
        let
          pattern = "-home-manager-files/";
  
          link = pkgs.writeText "link" ''
            newGenFiles="$1"
            shift
  