conf.nix

 {
 
 # NixPkgs Overrides
  nixpkgs.config = {
    allowUnfree = true;
    packageOverrides = super: let self = super.pkgs; in {

      gnome3.mutter = super.gnome3.mutter.overrideAttrs (old: {
        patches = [
         (pkgs.fetchpatch { url = "https://gist.githubusercontent.com/anonymous/4795f7913ae11405582a611c244a445b/raw";
          sha256 = "1zxd80lqx7a4crmrfdnmp5cd9bi2vd075w0lvxzap4m3j8q58spw";} )
          ];
      });

      grub2 = super.grub2.overrideAttrs (old: {
         prePatch = let fix = pkgs.fetchpatch {
		         url = "https://git.io/vFq8Y";
		         sha256 = "1impkw900f984qw1z1xk9nfz78r95mqghddianyyvip81cggqpd0";};
         in
         ''
         patch ./grub-core/kern/main.c ${fix}
         '';
       });

      polybar = super.polybar.override (old: {
         i3Support = true;
      });

    };
  };
  
  }