anchor.diff:    nativeBuildInputs =
       [ bdftopcf libfaketime
         fonttosfnt mkfontscale
  -    ] ++ optionals stdenv.isLinux [ perl kbd ];
  +    ] ++ lib.optionals stdenv.isLinux [ perl kbd ];
   
     postPatch = "patchShebangs .";
   
  
positive.code:     install -m 644 -D *.bdf -t "$bdf/share/fonts"
      mkfontdir "$bdf/share/fonts"
  
    '' + optionalString stdenv.isLinux ''
      # install psf (for linux virtual terminal)
      install -m 644 -D *.psf.gz -t "$out/share/consolefonts"
    '';
  
    outputs = [ "out" "bdf" ];
  
    meta = {
      description = "Unicode VGA font";
      maintainers = [ maintainers.ftrvxmtrx ];
      homepage = "http://www.inp.nsk.su/~bolkhov/files/fonts/univga/";
  
negative.code: { lib, stdenv, fetchurl, perl, kbd, bdftopcf
  , libfaketime, fonttosfnt, mkfontscale
  }:
  
  stdenv.mkDerivation {
    name = "uni-vga";
  