diff --git a/INSTALL.sh b/INSTALL.sh
index 59c90c3..92d273e 100755
--- a/INSTALL.sh
+++ b/INSTALL.sh
@@ -16,7 +16,8 @@ install -dm777 ${DESTDIR}${CACHE_DIR}/packages
 install -dm777 ${DESTDIR}${CACHE_DIR}/sources
 install -dm777 ${DESTDIR}${CACHE_DIR}/work
 
-install -m755 xchroot revdep pkgadd pkgdel pkgbuild pkgquery scratch updateconf ${DESTDIR}${BINDIR}
+install -m755 xchroot revdep pkgadd pkgdel pkgbuild pkgquery scratch updateconf \
+              pkgbase pkgdepends pkgrebuild pkgfix portcreate ${DESTDIR}${BINDIR}
 install -m644 scratchpkg.conf scratchpkg.repo scratchpkg.alias ${DESTDIR}${CONFDIR}
 
 install -m644 revdep.conf ${DESTDIR}${REVDEPCONF}
diff --git a/pkgbase b/pkgbase
new file mode 100755
index 0000000..d217ed8
--- /dev/null
+++ b/pkgbase
@@ -0,0 +1,54 @@
+#!/bin/sh
+#
+# script to remove all packages other than base and any user input
+#
+
+parseopt() {
+	while [ "$1" ]; do
+		case $1 in
+			-n) dryrun=1;;
+			-y) yes=$1;;
+			-h) printhelp; exit 0;;
+			*)  pkg="$pkg $1"
+		esac
+		shift
+	done
+}
+
+printhelp() {
+	cat << EOF
+Usage:
+  $(basename $0) [options] [packages]
+  
+Options:
+  -n  dry-run
+  -y  dont ask user confirmation
+  -h  print this help msg
+  
+EOF
+}
+
+parseopt "$@"
+
+echo "Calculate packages to keep..."
+keep=$(scratch deplist base $pkg | awk '{print $2}')
+
+echo "Calculate selected packages to remove..."
+for pkg in $(scratch installed | awk '{print $1}'); do
+	echo $keep | tr ' ' '\n' | grep -qx $pkg || {
+		remove="$remove $pkg"
+	}
+done
+
+[ "$remove" ] && {
+	[ "$dryrun" = 1 ] && {
+		for i in $remove; do
+			echo "remove: $i..."
+		done
+		echo "This is dry-run, no real action is run!"
+	} || {
+		scratch remove $yes $remove
+	}
+}
+
+exit $?
diff --git a/pkgdepends b/pkgdepends
new file mode 100755
index 0000000..b422e2d
--- /dev/null
+++ b/pkgdepends
@@ -0,0 +1,55 @@
+#!/bin/sh
+
+#
+# script to check dependencies
+#
+
+get_libpath() {
+	ldd $1 2>/dev/null | grep $2 | awk '{print $3}'
+}
+
+scratch files $1 | while read -r line; do
+	case $line in
+		usr/share/gir-1.0/*.gir) extra_dep="$extra_dep gobject-introspection";;
+		usr/share/vala/vapi/*.vapi) extra_dep="$extra_dep vala";;
+	esac
+	case $line in
+		*/) continue;;
+	esac
+	case "$(file -bi /$line)" in
+		*application/x-sharedlib* | *application/x-executable* | *application/x-pie-executable*)
+			for NEEDED in $(objdump -x /$line | grep NEEDED | awk '{print $2}'); do
+				case $NEEDED in
+					libc.so|libc.so.6) continue;;
+				esac
+				[ "$NEEDED" ] || continue
+				[ -f /"$line" ] || continue
+				libs=$(get_libpath /$line $NEEDED)
+				[ "$libs" ] || continue
+				if ! echo $all_libs | grep -qw $libs; then
+					pkg=$(scratch provide $libs$ | awk '{print $1}' | head -n1)
+					case $pkg in
+						$1|gcc|glibc|musl) continue;;
+					esac
+					[ "$pkg" ] || continue
+					if ! echo $all_pkgs | grep -qw $pkg; then
+						echo $pkg
+						all_pkgs="$all_pkgs $pkg"
+						unset pkg
+					fi
+					all_libs="$all_libs $libs"
+					unset libs
+				fi
+			done ;;
+	esac
+	[ "$extra_dep" ] && {
+		for e in $extra_dep; do
+			if ! echo $all_pkgs | grep -qw $e; then
+				echo $e
+				all_pkgs="$all_pkgs $e"
+			fi
+		done
+	}
+done
+
+exit 0
diff --git a/pkgfix b/pkgfix
new file mode 100755
index 0000000..2e0f37c
--- /dev/null
+++ b/pkgfix
@@ -0,0 +1,140 @@
+#!/bin/sh
+#
+#  Copyright (c) 2019 by Emmett1  (emmett1.2miligrams@gmail.com)
+#
+#  This program is free software: you can redistribute it and/or modify
+#  it under the terms of the GNU General Public License as published by
+#  the Free Software Foundation, either version 3 of the License, or
+#  (at your option) any later version.
+#
+#  This program is distributed in the hope that it will be useful,
+#  but WITHOUT ANY WARRANTY; without even the implied warranty of
+#  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+#  GNU General Public License for more details.
+#
+#  You should have received a copy of the GNU General Public License
+#  along with this program.  If not, see <https://www.gnu.org/licenses/>.
+#
+#
+#  script to detect broken kernel modules after kernel update
+#  need to use with 'scratchpkg'
+#
+
+export LANG=C
+
+get_perlmodules() {
+	command -v perl >/dev/null || return
+	perlpath=$(dirname $(perl -V:sitearch | grep -o "'.*'" | sed "s/'//g"))
+	for i in $(dirname $perlpath)/*; do
+		[ "$perlpath" = "$i" ] && continue	
+		brokenpkg="$brokenpkg $(scratch provide $i/$ | awk '{print $1}')"
+	done
+}
+
+get_modules() {
+	[ -f /lib/modules/KERNELVERSION ] || return
+	KERVER=$(cat /lib/modules/KERNELVERSION)
+	for i in /lib/modules/*; do
+		case $i in
+			/lib/modules/KERNELVERSION|/lib/modules/$KERVER) continue ;;
+		esac
+		brokenpkg="$brokenpkg $(scratch provide $i/$ | awk '{print $1}')"
+	done
+}
+
+get_rubygem() {
+	command -v gem >/dev/null || return
+	gempath=$(gem env gemdir)
+	for i in $(dirname $gempath)/*; do
+		[ "$gempath" = "$i" ] && continue
+		brokenpkg="$brokenpkg $(scratch provide $i/$ | awk '{print $1}')"
+	done
+}
+
+sort_modules() {
+	for all in $(scratch deplist $brokenpkg | cut -d ' ' -f2); do
+		for r in $brokenpkg; do
+			if [ $r = $all ]; then
+				if [ -z "$order" ]; then
+					order="$all"
+				else
+					order="$order $all"
+				fi
+				break
+			fi
+		done
+	done
+}
+
+confirm() {
+	printf "$1 (Y/n) "
+	read -r response
+	case "$response" in
+		[Nn][Oo]|[Nn]) echo "$2"; return 2 ;;
+		*) : ;;
+	esac
+	return 0
+}
+
+usage() {
+	cat << EOF
+Usage:
+  $(basename $0) [options]
+  
+Options:
+  -r     rebuild & reinstall broken package
+  -y     dont ask user confirmation to rebuild package (use with -r)
+  -h     print this help message
+
+EOF
+}
+
+parse_opt() {
+	while [ "$1" ]; do
+		case $1 in
+			-r) REBUILD=1 ;;
+			-y) YES=1 ;;
+			-h) usage; exit 0 ;;
+			*)  echo "Invalid option ($1)"; exit 1 ;;
+		esac
+		shift
+	done
+}
+
+parse_opt $@
+
+if [ "$REBUILD" ] && [ "$(id -u)" != 0 ]; then
+	echo "Rebuild broken packages required root!"
+	exit 1
+fi
+
+get_modules
+get_perlmodules
+get_rubygem
+
+if [ "$brokenpkg" ]; then
+	sort_modules
+else
+	echo "No broken packages found."
+	exit 0
+fi
+
+if [ "$REBUILD" = 1 ]; then
+	[ "$YES" ] || {
+		echo
+		echo "Package will be rebuild & reinstall by this order:"
+		echo " $order"
+		echo
+		confirm "Continue rebuild & reinstall broken packages?" "Operation cancelled."
+	}
+	for p in $order; do
+		scratch build -f $p && scratch install -r $p || exit 1
+	done
+else
+	echo "Broken packages:"
+	for p in $order; do
+		echo " $p"
+	done
+fi
+
+exit 0
diff --git a/pkgrebuild b/pkgrebuild
new file mode 100755
index 0000000..30f778d
--- /dev/null
+++ b/pkgrebuild
@@ -0,0 +1,33 @@
+#!/bin/sh
+#
+# script to rebuild base packages in right toolchain order
+#
+
+LIST="/tmp/$(basename $0)-list"
+touch $LIST
+
+TOOLCHAIN="linux-api-headers glibc-pass1 binutils-pass1 gcc binutils glibc"
+
+#scratch sync || exit 1
+
+for tc in $TOOLCHAIN; do
+	if [ ! $(grep -x $tc $LIST) ]; then
+		pkgname="$(echo $tc | sed 's/-pass1//')"
+		scratch build -f $pkgname || exit 1
+		echo $tc >> $LIST
+		scratch install -r $pkgname --no-backup || exit 1
+	fi
+done	
+
+for pkg in $(scratch deplist base | awk '{print $2}'); do
+	case $pkg in
+		linux-api-headers|musl|gcc|binutils|glibc) continue;;
+	esac
+	if [ ! $(grep -x $pkg $LIST) ]; then
+		scratch build -f $pkg || exit 1
+		echo $pkg >> $LIST
+		scratch install -r $pkg --no-backup || exit 1
+	fi
+done
+
+exit 0
diff --git a/portcreate b/portcreate
new file mode 100755
index 0000000..a1b6068
--- /dev/null
+++ b/portcreate
@@ -0,0 +1,48 @@
+#!/bin/sh
+#
+#  scratchpkg
+#
+#  Copyright (c) 2018 by Emmett1  (emmett1.2miligrams@gmail.com)
+#
+#  This program is free software: you can redistribute it and/or modify
+#  it under the terms of the GNU General Public License as published by
+#  the Free Software Foundation, either version 3 of the License, or
+#  (at your option) any later version.
+#
+#  This program is distributed in the hope that it will be useful,
+#  but WITHOUT ANY WARRANTY; without even the implied warranty of
+#  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+#  GNU General Public License for more details.
+#
+#  You should have received a copy of the GNU General Public License
+#  along with this program.  If not, see <https://www.gnu.org/licenses/>.
+#
+
+if [ -d "$1" ]; then
+	echo "ERROR: Directory '$1' already exist!"
+	exit 1
+else
+	mkdir "$1"
+	echo "# description	: 
+# homepage	: 
+# maintainer	: 
+# depends	: 
+
+name=$1
+version=
+release=1
+options=\"\"
+noextract=\"\"
+backup=\"\"
+source=\"\"
+
+build() {
+	cd \$name-\$version
+	./configure --prefix=/usr
+	make
+	make DESTDIR=\$PKG install
+}" > "$1"/spkgbuild
+	echo "Template port have created for '$1'."
+fi
+
+exit 0
diff --git a/xchroot b/xchroot
index 52cdaca..dd9d958 100755
--- a/xchroot
+++ b/xchroot
@@ -1,4 +1,7 @@
 #!/bin/sh
+#
+# script to enter chroot
+#
 
 printhelp() {
 	cat << EOF
@@ -14,6 +17,13 @@ EOF
 msgerr() {
 	echo "ERROR: $*"
 }
+
+unmount() {
+	while true; do
+		mountpoint -q $1 || break
+		umount $1 2>/dev/null
+	done
+}
 	
 [ "$(id -u)" = "0" ] || {
 	msgerr "$(basename $0) need root access!"
@@ -78,13 +88,13 @@ retval=$?
 	mv $TARGET/etc/resolv.conf.tmp $TARGET/etc/resolv.conf
 }
 
-umount -l $TARGET/dev/pts
-umount -l $TARGET/dev
-umount -l $TARGET/run
-umount -l $TARGET/proc
+unmount $TARGET/dev/pts
+unmount $TARGET/dev
+unmount $TARGET/run
+unmount $TARGET/proc
 if [ -n "$EFI_SYSTEM" ]; then
-	umount -l $TARGET/sys/firmware/efi/efivars
+	unmount $TARGET/sys/firmware/efi/efivars
 fi
-umount -l $TARGET/sys
+unmount $TARGET/sys
 
 exit $retval