{ stdenv, fetchurl, libfaketime
, fonttosfnt, mkfontscale
}:

stdenv.mkDerivation {
  name = "envypn-font-1.7.1";

  src = fetchurl {
    url = "https://ywstd.fr/files/p/envypn-font/envypn-font-1.7.1.tar.gz";
    sha256 = "bda67b6bc6d5d871a4d46565d4126729dfb8a0de9611dae6c68132a7b7db1270";
  };

  nativeBuildInputs = [ libfaketime fonttosfnt mkfontscale ];

  unpackPhase = ''
    tar -xzf $src --strip-components=1
  '';

  buildPhase = ''
    # convert pcf fonts to otb
    for i in *e.pcf.gz; do
      faketime -f "1970-01-01 00:00:01" \
      fonttosfnt -v -o "$(basename "$i" .pcf.gz)".otb "$i"
    done
  '';

  installPhase = ''
    install -D -m 644 -t "$out/share/fonts/misc" *.otb *.pcf.gz
    mkfontdir "$out/share/fonts/misc"
  '';

  meta = with stdenv.lib; {
    description = ''
      Readable bitmap font inspired by Envy Code R
    '';
    homepage = "http://ywstd.fr/p/pj/#envypn";
    license = licenses.miros;
    platforms = platforms.all;
  };
}
