Index: comms/rxtx/Makefile
===================================================================
--- comms/rxtx/Makefile
+++ comms/rxtx/Makefile
@@ -28,6 +28,7 @@
 INSTALL_TARGET=	install-strip
 
 USE_LDCONFIG=	yes
+MAKE_JOBS_UNSAFE=	yes
 
 PLIST_SUB=	JAVA_HOME=${JAVA_HOME:S,^${PREFIX}/,,}
 PLIST_SUB+=	ARCH=${ARCH:C/armv.*/arm/:S/powerpc64/ppc64/}