final: prev: {
  discord-canary = prev.discord-canary.overrideAttrs (old:
    let binaryName = "DiscordCanary"; in
    rec {
      version = "0.0.123";
      src = prev.fetchurl {
        url = "https://dl-canary.discordapp.net/apps/linux/${version}/discord-canary-${version}.tar.gz";
        sha256 = "0bijwfsd9s4awqkgxd9c2cxh7y5r06vix98qjp0dkv63r6jig8ch";
      };
      installPhase = ''
        mkdir -p $out/{bin,opt/${binaryName},share/pixmaps}
        mv * $out/opt/${binaryName}
        chmod +x $out/opt/${binaryName}/${binaryName}
        patchelf --set-interpreter ${prev.stdenv.cc.bintools.dynamicLinker} \
            $out/opt/${binaryName}/${binaryName}
        wrapProgram $out/opt/${binaryName}/${binaryName} \
            "''${gappsWrapperArgs[@]}" \
            --prefix XDG_DATA_DIRS : "${prev.gtk3}/share/gsettings-schemas/${prev.gtk3.name}/" \
            --prefix LD_LIBRARY_PATH : "${old.libPath}:${prev.electron_9}/lib/electron:${prev.libdrm}/lib:${prev.libGL_driver.out}/lib"
        ln -s $out/opt/${binaryName}/${binaryName} $out/bin/
        ln -s $out/opt/${binaryName}/discord.png $out/share/pixmaps/${old.pname}.png
        ln -s "${old.desktopItem}/share/applications" $out/share/
      '';
    });
}