This GTK3 theme is a phork of phisch's phocus theme, adjusted to match the gruvbox colorscheme.
gtk = {
enable = true;
theme = let
phocus = pkgs.stdenv.mkDerivation {
name = "phocus";
src = builtins.fetchTarball https://github.com/elkowar/gtk/archive/master.tar.gz;
nativeBuildInputs = [ pkgs.sass ];
installFlags = [ "DESTDIR=$(out)" "PREFIX=" ];
};
in {
package = phocus;
name = "phocus";
};
};
install sass
,
then just run make && sudo make install
to build and install the theme.