diff --git a/INSTALL.sh b/INSTALL.sh
index 6e7dcf4..418f6bf 100755
--- a/INSTALL.sh
+++ b/INSTALL.sh
@@ -11,7 +11,7 @@ REVDEPCONF=/etc/revdep.conf
 
 mkdir -pv ${DESTDIR}{${BINDIR},${CONFDIR},${HOOK_DIR},${PORT_DIR},${REVDEPD}}
 touch ${DESTDIR}${REVDEPCONF}
-install -m755 revdep pkgadd pkgdel pkgbuild pkgdeplist pkglibdepends scratch ${DESTDIR}${BINDIR}
+install -m755 revdep pkgadd pkgdel pkgbuild pkgdeplist pkglibdepends scratch pkgbase ${DESTDIR}${BINDIR}
 install -m644 scratchpkg.conf scratchpkg.repo ${DESTDIR}${CONFDIR}
 install -m755 extra/* ${DESTDIR}${BINDIR}
 mkdir -pv ${DESTDIR}${INDEX_DIR}/index
diff --git a/pkgbase b/pkgbase
new file mode 100755
index 0000000..4e8893c
--- /dev/null
+++ b/pkgbase
@@ -0,0 +1,26 @@
+#!/bin/bash
+
+keep=$(pkgdeplist -l base | awk '{print $2}')
+if [ "$1" ]; then
+	extrakeep=$(pkgdeplist -l $@ | awk '{print $2}')
+fi
+keep="$keep $extrakeep"
+
+allinstalled=$(scratch listinst | awk '{print $1}')
+
+for pkg in $allinstalled; do
+	echo $keep | tr ' ' '\n' | grep -qx $pkg
+	if [ "$?" != 0 ]; then
+		if [ "$remove" = "" ]; then
+			remove=$pkg
+		else
+			remove="$remove $pkg"
+		fi
+	fi
+done
+
+for i in $remove; do
+	pkgdel $i || exit 1
+done
+
+exit $?
diff --git a/revdep b/revdep
index 12c8c1c..6a14ec9 100755
--- a/revdep
+++ b/revdep
@@ -35,7 +35,8 @@ Usage:
   
 Options:
   -r, --rebuild                     rebuild & reinstall broken package
-  -e, --exclude <pkg1 pkg2 pkgN>    exclude package when rebuild (use with -r|--rebuild)
+  -e, --exclude <pkg1 pkg2 pkgN>    exclude package when rebuild (use with -r/--rebuild)
+  -n, --no-confirm                  dont ask user confirmation to rebuild package (use with -r/--rebuild)
   -h, --help                        print this help message
 
 EOF
@@ -45,6 +46,7 @@ parse_opt() {
 	while [ $1 ]; do
 		case $1 in
 			-r|--rebuild)	REBUILD=1 ;;
+			-n|--no-confirm) NOCONFIRM=1 ;;
 			-e|--exclude)	while [ "$2" ]; do
 								case $2 in
 									-*) break ;;
@@ -92,12 +94,14 @@ rebuild() {
 			fi
 		done
 	done
-	echo
-	echo "Package will be rebuild & reinstall by this order:"
-	echo $order
-	echo
-	echo "Press ENTER to continue"
-	read
+	if [ "$NOCONFIRM" = "" ]; then
+		echo
+		echo "Package will be rebuild & reinstall by this order:"
+		echo $order
+		echo
+		echo "Press ENTER to continue"
+		read
+	fi
 	for p in $order; do
 		scratch build -f $p && scratch install -r $p || exit 1
 	done