Index: Makefile.inc1
===================================================================
--- Makefile.inc1	(revision 245622)
+++ Makefile.inc1	(working copy)
@@ -271,7 +271,7 @@
 		_SHLIBDIRPREFIX=${WORLDTMP} \
 		_LDSCRIPTROOT= \
 		VERSION="${VERSION}" \
-		INSTALL="sh ${.CURDIR}/tools/install.sh" \
+		INSTALL="install -U" \
 		PATH=${TMPPATH}
 .if ${MK_CDDL} == "no"
 WMAKEENV+=	NO_CTF=1
@@ -326,7 +326,7 @@
 		_SHLIBDIRPREFIX=${LIB32TMP} \
 		_LDSCRIPTROOT=${LIB32TMP} \
 		VERSION="${VERSION}" \
-		INSTALL="sh ${.CURDIR}/tools/install.sh" \
+		INSTALL="install -U" \
 		PATH=${TMPPATH} \
 		LIBDIR=/usr/lib32 \
 		SHLIBDIR=/usr/lib32 \