Index: sysutils/DTraceToolkit/Makefile
===================================================================
--- sysutils/DTraceToolkit/Makefile
+++ sysutils/DTraceToolkit/Makefile
@@ -3,7 +3,7 @@
 
 PORTNAME=	dtrace-toolkit
 PORTVERSION=	1.0
-PORTREVISION=	4
+PORTREVISION=	5
 CATEGORIES=	sysutils
 
 MAINTAINER=	dteske@FreeBSD.org
@@ -76,6 +76,13 @@
 		statsnoop
 
 NO_BUILD=	yes
+
+.include <bsd.port.options.mk>
+
+.if ${OPSYS} == FreeBSD && ${OSVERSION} > 1200031
+# lstat calls are no longer available on 12.0+
+EXTRA_PATCHES=	${PATCHDIR}/extra-patch-dtruss
+.endif
 
 do-install:
 	@${MKDIR} ${STAGEDIR}${DATADIR}
Index: sysutils/DTraceToolkit/files/extra-patch-dtruss
===================================================================
--- /dev/null
+++ sysutils/DTraceToolkit/files/extra-patch-dtruss
@@ -0,0 +1,11 @@
+--- dtruss.orig	2018-06-18 09:22:32 UTC
++++ dtruss
+@@ -270,7 +270,7 @@ syscall::sigprocmask:return
+ /* print 3 args, arg0 as a string */
+ syscall::access*:return,
+ syscall::stat*:return, 
+-syscall::lstat*:return, 
++syscall::*lstat*:return, 
+ syscall::readlink*:return,
+ syscall::open*:return
+ /self->start/