anchor.diff:        then [ "--with-x-toolkit=${toolkit}" "--with-xft" ]
         else [ "--with-x=no" "--with-xpm=no" "--with-jpeg=no" "--with-png=no"
                "--with-gif=no" "--with-tiff=no" ])
  -    ++ lib.optional withXwidgets "--with-xwidgets";
  +    ++ lib.optional withXwidgets "--with-xwidgets"
  +    ++ lib.optional nativeComp "--with-nativecomp"
  +    ;
   
     preConfigure = lib.optionalString srcRepo ''
       ./autogen.sh
  
positive.code:   postInstall = ''
      mkdir -p $out/share/emacs/site-lisp
      cp ${siteStart} $out/share/emacs/site-lisp/site-start.el
      $out/bin/emacs --batch -f batch-byte-compile $out/share/emacs/site-lisp/site-start.el
  
      rm -rf $out/var
  
negative.code: , libtiff, librsvg, gconf, libxml2, imagemagick, gnutls, libselinux
  , alsaLib, cairo, acl, gpm, AppKit, GSS, ImageIO, m17n_lib, libotf
  , jansson, harfbuzz
  , libgccjit, targetPlatform, binutils, binutils-unwrapped, makeWrapper # native-comp params
  , systemd ? null
  , withX ? !stdenv.isDarwin
  , withNS ? stdenv.isDarwin
  