Add dep on Makefile

Makefile

@@ -1,7 +1,9 @@
 reload:	schema
 	busctl --user call org.gnome.Shell /org/gnome/Shell org.gnome.Shell Eval s 'Meta.restart("Restarting…")'
 
-schema:
+schema: schemas/gschemas.compiled
+
+schemas/gschemas.compiled: schemas/org.gnome.shell.extensions.monito@drieu.org.gschema.xml
 	glib-compile-schemas --strict schemas/
 
 pref: