diff --git a/sys/conf/Makefile.pc98 b/sys/conf/Makefile.pc98
index b8631c5a8e5b..69dc35668e29 100644
--- a/sys/conf/Makefile.pc98
+++ b/sys/conf/Makefile.pc98
@@ -199,7 +199,8 @@ genassym: genassym.o
 
 ${SYSTEM_OBJS} genassym.o vers.o: opt_global.h
 
-depend: assym.s param.c vnode_if.h ${BEFORE_DEPEND}
+depend: assym.s param.c vnode_if.h ${BEFORE_DEPEND} \
+	    ${CFILES} ${SYSTEM_CFILES} ${GEN_CFILES} ${SFILES} ${SYSTEM_SFILES}
 	rm -f .newdep
 	mkdep -a -f .newdep ${CFLAGS} ${CFILES} ${SYSTEM_CFILES}
 	mkdep -a -f .newdep ${GEN_CFLAGS} ${GEN_CFILES}
@@ -269,9 +270,11 @@ vers.c: $S/conf/newvers.sh $S/sys/param.h ${SYSTEM_DEP}
 vers.o:
 	${NORMAL_C}
 
-.ORDER: vnode_if.c vnode_if.h
-vnode_if.c vnode_if.h: $S/kern/vnode_if.sh $S/kern/vnode_if.src
-	sh $S/kern/vnode_if.sh $S/kern/vnode_if.src
+vnode_if.c: $S/kern/vnode_if.sh $S/kern/vnode_if.src
+	perl $S/kern/vnode_if.sh -c $S/kern/vnode_if.src
+
+vnode_if.h: $S/kern/vnode_if.sh $S/kern/vnode_if.src
+	perl $S/kern/vnode_if.sh -h $S/kern/vnode_if.src
 
 vnode_if.o:
 	${NORMAL_C}
diff --git a/sys/pc98/conf/Makefile.pc98 b/sys/pc98/conf/Makefile.pc98
index b8631c5a8e5b..69dc35668e29 100644
--- a/sys/pc98/conf/Makefile.pc98
+++ b/sys/pc98/conf/Makefile.pc98
@@ -199,7 +199,8 @@ genassym: genassym.o
 
 ${SYSTEM_OBJS} genassym.o vers.o: opt_global.h
 
-depend: assym.s param.c vnode_if.h ${BEFORE_DEPEND}
+depend: assym.s param.c vnode_if.h ${BEFORE_DEPEND} \
+	    ${CFILES} ${SYSTEM_CFILES} ${GEN_CFILES} ${SFILES} ${SYSTEM_SFILES}
 	rm -f .newdep
 	mkdep -a -f .newdep ${CFLAGS} ${CFILES} ${SYSTEM_CFILES}
 	mkdep -a -f .newdep ${GEN_CFLAGS} ${GEN_CFILES}
@@ -269,9 +270,11 @@ vers.c: $S/conf/newvers.sh $S/sys/param.h ${SYSTEM_DEP}
 vers.o:
 	${NORMAL_C}
 
-.ORDER: vnode_if.c vnode_if.h
-vnode_if.c vnode_if.h: $S/kern/vnode_if.sh $S/kern/vnode_if.src
-	sh $S/kern/vnode_if.sh $S/kern/vnode_if.src
+vnode_if.c: $S/kern/vnode_if.sh $S/kern/vnode_if.src
+	perl $S/kern/vnode_if.sh -c $S/kern/vnode_if.src
+
+vnode_if.h: $S/kern/vnode_if.sh $S/kern/vnode_if.src
+	perl $S/kern/vnode_if.sh -h $S/kern/vnode_if.src
 
 vnode_if.o:
 	${NORMAL_C}