anchor.diff:    };
   
     nativeBuildInputs =
  -    [ mkfontdir mkfontscale bdf2psf bdftopcf fonttosfnt ];
  +    [ mkfontdir mkfontscale bdf2psf bdftopcf
  +      fonttosfnt libfaketime
  +    ];
   
     buildPhase = ''
       # convert bdf fonts to psf
  
positive.code: { stdenv, fetchurl, fetchFromGitHub
  , mkfontdir, mkfontscale, bdf2psf, bdftopcf
  , fonttosfnt
  }:
  
  stdenv.mkDerivation rec {
  
negative.code:     for i in *.bdf $src/hidpi/*.bdf; do
          name=$(basename $i .bdf)
          bdftopcf -o "$name.pcf" "$i"
          faketime -f "1970-01-01 00:00:01" fonttosfnt -v -o "$name.otb" "$i" || true
      done
    '';
  
  