chore: update pop-shell

pkgs/pop-shell/default.nix

@@ -0,0 +1,24 @@
+{ lib, fetchFromGitHub, stdenv, glib, nodePackages, gjs }:
+
+stdenv.mkDerivation rec {
+  pname = "pop-shell";
+  version = "2021-09-10";
+
+  src = fetchFromGitHub {
+    owner = "pop-os";
+    repo = "shell";
+    rev = "59ca9cede3c185c347bd2ae3d40882e020fb1fd0";
+    sha256 = "llwchrg/a8QmmD9eOt7IUZY2crYubFSDyvrTVwSz0pE=";
+  };
+
+  nativeBuildInputs = [ glib nodePackages.typescript gjs ];
+
+  buildInputs = [ gjs ];
+
+  # the gschema doesn't seem to be installed properly (see dconf)
+  makeFlags = [
+    "INSTALLBASE=$(out)/share/gnome-shell/extensions"
+    "PLUGIN_BASE=$(out)/share/pop-shell/launcher"
+    "SCRIPTS_BASE=$(out)/share/pop-shell/scripts"
+  ];
+}