nixpkgs/pkgs/applications/window-managers/yabar/unstable.nix

{ playerctl, libxkbcommon, callPackage, attrs ? {} }:

let
  pkg = callPackage ./build.nix ({
    version = "unstable-2018-01-18";

    rev    = "c516e8e78d39dd2b339acadc4c175347171150bb";
    sha256 = "1p9lx78cayyn7qc2q66id2xfs76jyddnqv2x1ypsvixaxwcvqgdb";
  } // attrs);
in pkg.overrideAttrs (o: {
  buildInputs = o.buildInputs ++ [
    playerctl libxkbcommon
  ];

  makeFlags = o.makeFlags ++ [
    "PLAYERCTL=1"
  ];
})