diff --git a/Makefile.inc1 b/Makefile.inc1
index 34369a851e71..771f852c94db 100644
--- a/Makefile.inc1
+++ b/Makefile.inc1
@@ -1733,7 +1733,8 @@ NOFUN=-DNO_FSCHG -DWITHOUT_HTML -DWITHOUT_INFO -DNO_LINT \
 
 XDDIR=${XDEV_ARCH}-freebsd
 XDTP=/usr/${XDDIR}
-CDBENV=MAKEOBJDIRPREFIX=${MAKEOBJDIRPREFIX}/${XDDIR}
+CDBENV=MAKEOBJDIRPREFIX=${MAKEOBJDIRPREFIX}/${XDDIR} \
+	INSTALL="sh ${.CURDIR}/tools/install.sh"
 CDENV= ${CDBENV} \
 	_SHLIBDIRPREFIX=${XDTP} \
 	TOOLS_PREFIX=${XDTP}