fixup! fixup! fixup! Check if all required services are startable, no…

…t just exists

src/systemd.py

@@ -33,7 +33,7 @@ def get_required_services(service: str) -> typing.List[str]:
         universal_newlines=True
     )
 
-    required_services = res.stdout.split('s=')[1].split()
+    required_services = [service in service from res.stdout.split('s=')[1].split() if '.service' in service]
     return required_services