diff --git a/nixos/modules/programs/environment.nix b/nixos/modules/programs/environment.nix
index d92c41891594..4bbc750fd52e 100644
--- a/nixos/modules/programs/environment.nix
+++ b/nixos/modules/programs/environment.nix
@@ -23,6 +23,7 @@ in
         XCURSOR_PATH = [ "$HOME/.icons" ];
         XDG_CONFIG_DIRS = [ "/etc/xdg" ]; # needs to be before profile-relative paths to allow changes through environment.etc
         GTK_DATA_PREFIX = "${config.system.path}"; # needed for gtk2 apps to find themes
+        GTK_EXE_PREFIX = "${config.system.path}";
       };
 
     environment.profiles = mkAfter