net/sslh is not jobs safe

This port has failed on me twice so far.  The problem is that version.h
is generated, but common.c doesn't want for that to finish, and it
includes the header incomplete.

1 files changed, 2 insertions, 0 deletions

diff --git a/net/sslh/Makefile b/net/sslh/Makefile
index 69a288ec6f96..42777237bdf3 100644
--- a/net/sslh/Makefile
+++ b/net/sslh/Makefile
@@ -32,6 +32,8 @@ USE_RC_SUBR=	sslh
 
 PORTEXAMPLES=	example.cfg
 
+MAKE_JOBS_UNSAFE=	yes
+
 .include <bsd.port.options.mk>
 
 .if ${PORT_OPTIONS:MLIBWRAP}