diff --git a/find-modules/run-sip.py b/find-modules/run-sip.py
--- a/find-modules/run-sip.py
+++ b/find-modules/run-sip.py
@@ -6,6 +6,15 @@
 
 sipArgs = sys.argv[1:]
 
+try:
+    from PyQt5.Qt import PYQT_CONFIGURATION
+    import re
+    m = re.search('-n\s*(\S+)', PYQT_CONFIGURATION["sip_flags"])
+    if m:
+        sipArgs = ['-n', m.group(1)] + sipArgs
+except:
+    pass
+
 idx = sipArgs.index("--module-name")
 modname = sipArgs[idx + 1]
 del sipArgs[idx]