Fix issue 5224.
diff --git a/Mac/BuildScript/build-installer.py b/Mac/BuildScript/build-installer.py
index 2408960..559b5de 100755
--- a/Mac/BuildScript/build-installer.py
+++ b/Mac/BuildScript/build-installer.py
@@ -1031,8 +1031,7 @@
     buildPythonDocs()
     fn = os.path.join(WORKDIR, "_root", "Applications",
                 "Python %s"%(getVersion(),), "Update Shell Profile.command")
-    patchFile("scripts/postflight.patch-profile",  fn)
-    os.chmod(fn, 0755)
+    patchScript("scripts/postflight.patch-profile",  fn)
 
     folder = os.path.join(WORKDIR, "_root", "Applications", "Python %s"%(
         getVersion(),))