diff --git a/ui-macos/bits/runpython.do b/ui-macos/bits/runpython.do
index ced2b65..e8082c5 100644
--- a/ui-macos/bits/runpython.do
+++ b/ui-macos/bits/runpython.do
@@ -1,9 +1,13 @@
 exec >&2
 redo-ifchange runpython.c
 ARCHES=""
+printf "Platforms: "
 for d in /usr/libexec/gcc/darwin/*; do
-    ARCHES="$ARCHES -arch $(basename $d)"
+    PLAT=$(basename "$d")
+    ARCHES="$ARCHES -arch $PLAT"
+    printf "$PLAT "
 done
+printf "\n"
 gcc $ARCHES \
 	-Wall -o $3 runpython.c \
 	-I/usr/include/python2.5 \