diff --git a/setup/plugins_mirror.py b/setup/plugins_mirror.py
index 8d82e0346d..8a5915c766 100644
--- a/setup/plugins_mirror.py
+++ b/setup/plugins_mirror.py
@@ -576,7 +576,7 @@ def main():
             os.chdir(WORKDIR)
         else:
             raise
-    if not singleinstance():
+    if os.geteuid() == 0 and not singleinstance():
         print('Another instance of plugins-mirror is running', file=sys.stderr)
         raise SystemExit(1)
     open('log', 'w').close()