Update mkmk.sh.
diff --git a/src/lib9/mkfile b/src/lib9/mkfile
index 70b06a2..16804b3 100644
--- a/src/lib9/mkfile
+++ b/src/lib9/mkfile
@@ -65,9 +65,7 @@
 	utfrune.$O\
 	utfutf.$O\
 
-OFILES=\
-	$FMTOFILES\
-	$UTFOFILES\
+LIB9OFILES=\
 	_exits.$O\
 	_p9dialparse.$O\
 	_p9dir.$O\
@@ -145,6 +143,11 @@
 	wait.$O\
 	waitpid.$O\
 
+OFILES=\
+	$LIB9OFILES\
+	$FMTOFILES\
+	$UTFOFILES\
+
 HFILES=\
 	$PLAN9/include/lib9.h\