{ config, pkgs, ... }: { nixpkgs.overlays = [ (final: prev: { gnome = prev.gnome.overrideScope (gnomeFinal: gnomePrev: { mutter = gnomePrev.mutter.overrideAttrs ( old: { src = pkgs.fetchgit { url = "https://gitlab.gnome.org/vanvugt/mutter.git"; # GNOME 45: triple-buffering-v4-45 rev = "0b896518b2028d9c4d6ea44806d093fd33793689"; sha256 = "sha256-mzNy5GPlB2qkI2KEAErJQzO//uo8yO0kPQUwvGDwR4w="; }; } ); }); }) ]; }