Create shared.PROFILE

src/shared.py.in

@@ -25,6 +25,7 @@ from gi.repository import Gdk, Gio
 APP_ID = "@APP_ID@"
 VERSION = "@VERSION@"
 PREFIX = "@PREFIX@"
+PROFILE = "@PROFILE@"
 SPEC_VERSION = 1.5  # The version of the game_id.json spec
 
 schema = Gio.Settings.new(APP_ID)

src/window.py

@@ -90,7 +90,7 @@ class CartridgesWindow(Adw.ApplicationWindow):
 
         self.notice_empty.set_icon_name(shared.APP_ID + "-symbolic")
 
-        if "Devel" in shared.APP_ID:
+        if shared.PROFILE == "development":
             self.add_css_class("devel")
 
         # Connect search entries