diff --git a/Tools/msi/msi.py b/Tools/msi/msi.py
index 44f5665..efa1696 100644
--- a/Tools/msi/msi.py
+++ b/Tools/msi/msi.py
@@ -367,7 +367,7 @@
               ("VerdanaRed9", "Verdana", 9, 255, 0),
              ])
 
-    compileargs = r"-Wi [TARGETDIR]Lib\compileall.py -f -x badsyntax [TARGETDIR]Lib"
+    compileargs = r"-Wi [TARGETDIR]Lib\compileall.py -f -x bad_coding|badsyntax|site-packages [TARGETDIR]Lib"
     # See "CustomAction Table"
     add_data(db, "CustomAction", [
         # msidbCustomActionTypeFirstSequence + msidbCustomActionTypeTextData + msidbCustomActionTypeProperty