Fix make buildbottest to not re-trigger a profile-opt build. issue28035.
diff --git a/Makefile.pre.in b/Makefile.pre.in
index 07d2350..139a211 100644
--- a/Makefile.pre.in
+++ b/Makefile.pre.in
@@ -883,7 +883,7 @@
 
 # Like testall, but with a single pass only
 # run an optional script to include some information about the build environment
-buildbottest:	all platform
+buildbottest:	build_all platform
 		-@if which pybuildbot.identify >/dev/null 2>&1; then \
 			pybuildbot.identify "CC='$(CC)'" "CXX='$(CXX)'"; \
 		fi