--- a/components/logilab-common/Makefile	Mon Jun 29 11:36:22 2015 -0700
+++ b/components/logilab-common/Makefile	Mon Jun 29 18:33:05 2015 -0700
@@ -41,6 +41,14 @@
 PYTHON_VERSIONS=	2.7 2.6
 
 include $(WS_MAKE_RULES)/prep.mk
+
+# pyorbit-27 is only available on S11.3 and later
+ifeq ($(BUILD_TYPE), evaluation)
+BUILD_NO_ARCH=
+INSTALL_NO_ARCH=
+PUBLISH_STAMP=
+endif
+
 include $(WS_MAKE_RULES)/ips.mk
 include $(WS_MAKE_RULES)/setup.py.mk