Index: head/devel/gdb/Makefile
===================================================================
--- head/devel/gdb/Makefile
+++ head/devel/gdb/Makefile
@@ -20,6 +20,7 @@
 TEST_DEPENDS=	runtest:misc/dejagnu
 
 USES=		compiler:c++11-lang cpe gmake libtool tar:xz
+USE_PYTHON=	py3kplist
 
 TEST_TARGET=	check