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-rw-r--r--comms/vpb-driver/Makefile4
1 files changed, 4 insertions, 0 deletions
diff --git a/comms/vpb-driver/Makefile b/comms/vpb-driver/Makefile
index b1622eb06dd8..4bfe15b33a4c 100644
--- a/comms/vpb-driver/Makefile
+++ b/comms/vpb-driver/Makefile
@@ -28,6 +28,10 @@ SED_SCRIPT= -e 's,%%PREFIX%%,${PREFIX},g' \
.include <bsd.port.pre.mk>
+.if !exists(/usr/src/sys)
+IGNORE= Requires kernel source (/usr/src/sys) to build
+.endif
+
.if ${OSVERSION} < 502000 || ${OSVERSION} >= 600000
IGNORE= is not for FreeBSD versions < 502000, or >= 600000
.endif