Index: pym/portage/__init__.py
===================================================================
--- pym/portage/__init__.py	(revision 12258)
+++ pym/portage/__init__.py	(revision 12259)
@@ -4572,10 +4572,10 @@
 
 	configure_opts_warn = []
 	configure_opts_warn_re = re.compile(
-		r'^configure: WARNING: Unrecognized options: .*')
-	am_maintainer_mode_re = re.compile(r'.*/missing --run .*')
+		r'^configure: WARNING: Unrecognized options: ')
+	am_maintainer_mode_re = re.compile(r'/missing --run ')
 	am_maintainer_mode_exclude_re = \
-		re.compile(r'.*/missing --run (autoheader|makeinfo)')
+		re.compile(r'/missing --run (autoheader|makeinfo)')
 
 	make_jobserver_re = \
 		re.compile(r'g?make\[\d+\]: warning: jobserver unavailable:')