--- bsd.python.mk	2014-08-06 10:27:45.000000000 +0200
+++ /tmp/bsd.python.mk	2014-08-06 10:27:30.000000000 +0200
@@ -353,7 +353,7 @@
 PYTHON_REL=		341
 PYTHON_SUFFIX=		34
 PYTHON_VER=		3.4
-.if exists(${PYTHON_CMD}-config) && ${PORTNAME} != python34
+.if exists(${PYTHON_CMD}-config) && defined(PORTNAME) && ${PORTNAME} != python34
 PYTHON_ABIVER!=		${PYTHON_CMD}-config --abiflags
 .endif