anchor.diff:    patches = [ ./determinism.patch ];
   
     nativeBuildInputs = [ perl bdftopcf bdf2psf fonttosfnt mkfontdir ];
  -
  -  outputHashAlgo = "sha256";
  -  outputHashMode = "recursive";
  -  outputHash     = "0hzhaakbbcnz5ksi5p8mavw9578rsqlqadkrirrkhfnyqqlrii4j";
   
     # configure sizes, encodings and variants
     preConfigure =
  
positive.code:         --fb "$i" standard.equivalents \
          ascii.set+useful.set+linux.set 512 \
          "$build/psf/$name.psf"
        fonttosfnt -v -o "$build/otb/$name.otb" "$i"
      done
      cd $build
    '';
  
    postInstall = ''
      # install psf fonts
      fontDir="$out/share/consolefonts"
      mkdir -p "$fontDir"
      mv -t "$fontDir" psf/*.psf
      mv -t "$out/share/fonts/X11/misc" otb/*.otb
    '';
  
    meta = with stdenv.lib; {
      description = "Monospace bitmap screen fonts for X11";
  
negative.code:       else ''cp "${variantsDat}" VARIANTS.dat'');
  
    postBuild = ''
      # convert bdf fonts to psf
      build=$(pwd)
      mkdir {psf,otb}
      cd ${bdf2psf}/share/bdf2psf
  