{ config, lib, pkgs, ... }: { environment.variables = { GTK_DATA_PREFIX = [ "${config.system.path}" ]; QT_QPA_PLATFORMTHEME = "gtk2"; }; qt5 = { style = "gtk2"; platformTheme = "gtk2"; }; services.xserver.displayManager.sessionCommands = '' export GTK2_RC_FILES="$XDG_CONFIG_HOME/gtk-2.0/gtkrc" source "$XDG_CONFIG_HOME"/xsession/*.sh xrdb -merge "$XDG_CONFIG_HOME"/xtheme/* ''; }