diff --git a/README.md b/README.md
index 3be1d7c..8d1b21d 100644
--- a/README.md
+++ b/README.md
@@ -129,7 +129,7 @@ Available options:
       
 ### pkgadd
 `pkgadd` is a tool to install and upgrade package created by `pkgbuild`. Install package is simply extract
-`<name>-<version>-<release>.spkg.txz` by using tar into real system then save list extracted file into package `INDEX_DIR`.
+`<name>-<version>-<release>.spkg.txz` by using tar into real system then save list extracted file into package `PKGDB_DIR`.
 Upgrading package is also using same extract as install, it will replace old files then compare list file from old and new
 package and remove old file which not exist in new package (like Slackware pkgtool does).
 
@@ -154,7 +154,7 @@ package and remove old file which not exist in new package (like Slackware pkgto
                                                          old configuration files and skip conflict check
                                                              
 ### pkgdel
-`pkgdel` is a tool to remove package from system. It will read file listed in package `INDEX_DIR` and remove it.
+`pkgdel` is a tool to remove package from system. It will read file listed in package `PKGDB_DIR` and remove it.
 
     Usage:
       pkgdel [ <options> <package name> ]
diff --git a/pkgadd b/pkgadd
index 4b9e5bc..8e8c898 100755
--- a/pkgadd
+++ b/pkgadd
@@ -59,6 +59,7 @@ Options:
       --no-preupgrade        skip preupgrade script before upgrade package
       --no-postupgrade       skip postupgrade script after upgrade package
       --no-backup            skip backup when upgrading package
+      --print-dbdir          print package database path
       --root=<path>          install to custom root directory
       
 EOF
@@ -96,6 +97,7 @@ parse_opts() {
 			         --no-preupgrade) NO_PREUPGRADE=yes ;;
 			        --no-postupgrade) NO_POSTUPGRADE=yes ;;
 			             --no-backup) NO_BACKUP=yes ;;
+			           --print-dbdir) PRINTDBDIR=yes ;;
 			                --root=*) ROOT_DIR="${1#*=}" ;;
 			            *.spkg.tar.*) PKGNAME="$(realpath $1)" ;;
 			                       *) msg "Invalid option! ($1)"; exit 1 ;;
@@ -112,7 +114,7 @@ ret() {
 }
 
 isinstalled() {
-	if [ -s "$ROOT_DIR/$INDEX_DIR/$1/.pkginfo" ] && grep -q "$1" "$ROOT_DIR/$INDEX_DIR/$1/.pkginfo"; then
+	if [ -s "$ROOT_DIR/$PKGDB_DIR/$1/.pkginfo" ] && grep -q "$1" "$ROOT_DIR/$PKGDB_DIR/$1/.pkginfo"; then
 		return 0
 	else
 		return 1
@@ -130,17 +132,24 @@ run_scripts() {
 parse_opts $(extract_opts "$@")
 
 SCRATCHPKG_DIR="var/lib/scratchpkg"
-INDEX_DIR="$SCRATCHPKG_DIR/index"
+PKGDB_DIR="$SCRATCHPKG_DIR/index"
 LOCK_FILE="$SCRATCHPKG_DIR/spkg.lock"
 
+ROOT_DIR="${ROOT_DIR%/}" # remove trailing slash
+
+[ "$PRINTDBDIR" ] && {
+	echo "$ROOT_DIR/$PKGDB_DIR"
+	ret 0
+}
+
 # show help page
 [ "$SHOWHELP" ] || [ -z "$PKGNAME" ] && {
 	help
 	ret 0
 }
 
-[ -d "$ROOT_DIR/$INDEX_DIR" ] || {
-	msgerr "Package's database directory not exist: $ROOT_DIR/$INDEX_DIR"
+[ -d "$ROOT_DIR/$PKGDB_DIR" ] || {
+	msgerr "Package's database directory not exist: $ROOT_DIR/$PKGDB_DIR"
 	ret 1
 }
 
@@ -178,8 +187,8 @@ name=${noextname%-*}
 
 # get package information if installed
 if isinstalled $name; then
-	iversion=$(grep ^version $ROOT_DIR/$INDEX_DIR/$name/.pkginfo | cut -d " " -f3-)
-	irelease=$(grep ^release $ROOT_DIR/$INDEX_DIR/$name/.pkginfo | cut -d " " -f3-)
+	iversion=$(grep ^version $ROOT_DIR/$PKGDB_DIR/$name/.pkginfo | cut -d " " -f3-)
+	irelease=$(grep ^release $ROOT_DIR/$PKGDB_DIR/$name/.pkginfo | cut -d " " -f3-)
 	ALREADYINSTALLED=yes
 fi
 
@@ -227,7 +236,7 @@ if [ ! "$IGNORE_CONFLICT" ]; then
 		fi
 		if [ -e "$ROOT_DIR/$line" ] || [ -L "$ROOT_DIR/$line" ]; then
 			if [ "$UPGRADE_PKG" ] || [ "$REINSTALL_PKG" ]; then
-				if ! grep -Fqx "$line" "$ROOT_DIR/$INDEX_DIR/$name/.files"; then
+				if ! grep -Fqx "$line" "$ROOT_DIR/$PKGDB_DIR/$name/.files"; then
 					echo "$line"
 					touch "$TMP_CONFLICT"
 				fi
@@ -290,12 +299,12 @@ if [ "$UPGRADE_PKG" ] || [ "$REINSTALL_PKG" ]; then
 	rmlist_dir="$ROOT_DIR/$SCRATCHPKG_DIR/.rmlist_dir"
 	reserve_dir="$ROOT_DIR/$SCRATCHPKG_DIR/.reserve_dir"
 	rmlist_all="$ROOT_DIR/$SCRATCHPKG_DIR/.rmlist_all"
-	grep '/$' $ROOT_DIR/$INDEX_DIR/*/.files \
-		| grep -v $ROOT_DIR/$INDEX_DIR/$name/.files \
+	grep '/$' $ROOT_DIR/$PKGDB_DIR/*/.files \
+		| grep -v $ROOT_DIR/$PKGDB_DIR/$name/.files \
 		| awk -F : '{print $2}' \
 		| sort \
 		| uniq > $reserve_dir                                                        # get list reserved dirs
-	grep -Fxv -f "$TMP_PKGINSTALL" $ROOT_DIR/$INDEX_DIR/$name/.files > $rmlist_all   # get list files and dirs to remove
+	grep -Fxv -f "$TMP_PKGINSTALL" $ROOT_DIR/$PKGDB_DIR/$name/.files > $rmlist_all   # get list files and dirs to remove
 	grep -v '/$' "$rmlist_all" | tac > "$rmlist_file"                                # get files only to remove
 	grep -Fxv -f "$reserve_dir" "$rmlist_all" | grep '/$' | tac > "$rmlist_dir"      # get dirs only (safe) to remove
 	(cd "$ROOT_DIR"/
@@ -306,30 +315,30 @@ if [ "$UPGRADE_PKG" ] || [ "$REINSTALL_PKG" ]; then
 fi
 
 # register package into database
-rm -fr "$ROOT_DIR/$INDEX_DIR/$name"
-mkdir "$ROOT_DIR/$INDEX_DIR/$name"
-echo "name = $name" > "$ROOT_DIR/$INDEX_DIR/$name/.pkginfo"
-echo "version = $version" >> "$ROOT_DIR/$INDEX_DIR/$name/.pkginfo"
-echo "release = $release" >> "$ROOT_DIR/$INDEX_DIR/$name/.pkginfo"
-install -m644 "$TMP_PKGINSTALL" "$ROOT_DIR/$INDEX_DIR/$name/.files"
+rm -fr "$ROOT_DIR/$PKGDB_DIR/$name"
+mkdir "$ROOT_DIR/$PKGDB_DIR/$name"
+echo "name = $name" > "$ROOT_DIR/$PKGDB_DIR/$name/.pkginfo"
+echo "version = $version" >> "$ROOT_DIR/$PKGDB_DIR/$name/.pkginfo"
+echo "release = $release" >> "$ROOT_DIR/$PKGDB_DIR/$name/.pkginfo"
+install -m644 "$TMP_PKGINSTALL" "$ROOT_DIR/$PKGDB_DIR/$name/.files"
 
 for ii in $(grep ^.pkg* $TMP_PKGADD); do
 	pkgfiles="$pkgfiles $ii"
 done
 
 if [ "$pkgfiles" ]; then
-	tar -x -f "$PKGNAME" -C "$ROOT_DIR/$INDEX_DIR/$name" $pkgfiles >/dev/null 2>&1
+	tar -x -f "$PKGNAME" -C "$ROOT_DIR/$PKGDB_DIR/$name" $pkgfiles >/dev/null 2>&1
 fi
 
-if [ -f "$ROOT_DIR/$INDEX_DIR/$name/.pkginstall" ]; then
+if [ -f "$ROOT_DIR/$PKGDB_DIR/$name/.pkginstall" ]; then
 	if [ ! "$NO_POSTINSTALL" ] && [ ! "$UPGRADE_PKG" ]; then
 		(cd "$ROOT_DIR"/
-			run_scripts "$INDEX_DIR/$name/.pkginstall" post-install "$version"
+			run_scripts "$PKGDB_DIR/$name/.pkginstall" post-install "$version"
 		)
 	fi
 	if [ "$UPGRADE_PKG" ] && [ ! "$NO_POSTUPGRADE" ]; then
 		(cd "$ROOT_DIR"/
-			run_scripts "$INDEX_DIR/$name/.pkginstall" post-upgrade "$version" "$iversion"
+			run_scripts "$PKGDB_DIR/$name/.pkginstall" post-upgrade "$version" "$iversion"
 		)
 	fi
 fi
diff --git a/pkgdel b/pkgdel
index 8c1b6ff..a2424e0 100755
--- a/pkgdel
+++ b/pkgdel
@@ -100,7 +100,7 @@ ret() {
 }
 
 isinstalled() {
-	if [ -s "$ROOT_DIR/$INDEX_DIR/$1/.pkginfo" ] && grep -q "$1" "$ROOT_DIR/$INDEX_DIR/$1/.pkginfo"; then
+	if [ -s "$ROOT_DIR/$PKGDB_DIR/$1/.pkginfo" ] && grep -q "$1" "$ROOT_DIR/$PKGDB_DIR/$1/.pkginfo"; then
 		return 0
 	else
 		return 1
@@ -115,9 +115,15 @@ run_scripts() {
 	fi
 }
 
+command -v pkgadd >/dev/null 2>&1 || {
+	msgerr "'pkgadd' not found in \$PATH!"
+	exit 1
+}
+
 parse_opts $(extract_opts "$@")
 
-INDEX_DIR="var/lib/scratchpkg/index"
+PKGDB_DIR="$(pkgadd --print-dbdir)"
+PKGDB_DIR="${PKGDB_DIR##/}"              # remove leading /
 LOCK_FILE="var/lib/scratchpkg/spkg.lock"
 
 # show help page
@@ -149,9 +155,9 @@ if ! isinstalled "$RMNAME"; then
 	ret 1
 fi
 
-name=$(grep ^name $ROOT_DIR/$INDEX_DIR/$RMNAME/.pkginfo | cut -d " " -f3-)
-version=$(grep ^version $ROOT_DIR/$INDEX_DIR/$RMNAME/.pkginfo | cut -d " " -f3-)
-release=$(grep ^release $ROOT_DIR/$INDEX_DIR/$RMNAME/.pkginfo | cut -d " " -f3-)
+name=$(grep ^name $ROOT_DIR/$PKGDB_DIR/$RMNAME/.pkginfo | cut -d " " -f3-)
+version=$(grep ^version $ROOT_DIR/$PKGDB_DIR/$RMNAME/.pkginfo | cut -d " " -f3-)
+release=$(grep ^release $ROOT_DIR/$PKGDB_DIR/$RMNAME/.pkginfo | cut -d " " -f3-)
 
 if [ -z "$name" ] && [ -z "$version" ] && [ -z "$release" ]; then
 	msgerr "Package '$RMNAME' not installed but exist in database."
@@ -164,21 +170,21 @@ remove="$ROOT_DIR/$SCRATCHPKG_DIR/.pkgdel_remove"
 dirs="$ROOT_DIR/$SCRATCHPKG_DIR/.pkgdel_dirs"
 files="$ROOT_DIR/$SCRATCHPKG_DIR/.pkgdel_files"
 
-grep '/$' $ROOT_DIR/$INDEX_DIR/*/.files \
-	| grep -v "$ROOT_DIR/$INDEX_DIR/$name" \
+grep '/$' $ROOT_DIR/$PKGDB_DIR/*/.files \
+	| grep -v "$ROOT_DIR/$PKGDB_DIR/$name" \
 	| awk -F : '{print $2}' \
 	| sort \
 	| uniq > "$reserve"
-grep '/$' "$ROOT_DIR/$INDEX_DIR/$name/.files" > "$remove"
+grep '/$' "$ROOT_DIR/$PKGDB_DIR/$name/.files" > "$remove"
 grep -Fxv -f "$reserve" "$remove" | tac > "$dirs"
-grep -v '/$' "$ROOT_DIR/$INDEX_DIR/$name/.files" | tac >> "$files"
+grep -v '/$' "$ROOT_DIR/$PKGDB_DIR/$name/.files" | tac >> "$files"
 
 echo "remove: $name-$version-$release..."
 
 # pre-remove script
-if [ ! "$NO_PREREMOVE" ] && [ -f "$ROOT_DIR/$INDEX_DIR/$name/.pkginstall" ]; then
+if [ ! "$NO_PREREMOVE" ] && [ -f "$ROOT_DIR/$PKGDB_DIR/$name/.pkginstall" ]; then
 	(cd "$ROOT_DIR"/
-		run_scripts "$INDEX_DIR/$name/.pkginstall" pre-remove "$version"
+		run_scripts "$PKGDB_DIR/$name/.pkginstall" pre-remove "$version"
 	)
 fi
 
@@ -191,14 +197,14 @@ fi
 rm -f "$reserve" "$dirs" "$remove" "$files"
 
 # post-remove script
-if [ ! "$NO_POSTREMOVE" ] && [ -f "$ROOT_DIR/$INDEX_DIR/$name/.pkginstall" ]; then
+if [ ! "$NO_POSTREMOVE" ] && [ -f "$ROOT_DIR/$PKGDB_DIR/$name/.pkginstall" ]; then
 	(cd "$ROOT_DIR"/
-		run_scripts "$INDEX_DIR/$name/.pkginstall" post-remove "$version"
+		run_scripts "$PKGDB_DIR/$name/.pkginstall" post-remove "$version"
 	)
 fi
 
 # remove from database
-rm -rf "$ROOT_DIR/$INDEX_DIR/$name"
+rm -rf "$ROOT_DIR/$PKGDB_DIR/$name"
 
 # running ldconfig
 if [ -x "$ROOT_DIR"/sbin/ldconfig ]; then
diff --git a/revdep b/revdep
index c449989..86e5612 100755
--- a/revdep
+++ b/revdep
@@ -164,8 +164,13 @@ rev_exclude() {
 
 trap "interrupted" 1 2 3 15
 
+command -v pkgadd >/dev/null 2>&1 || {
+	echo "'pkgadd' not found in \$PATH!"
+	exit 1
+}
+
 # package database directory
-INDEX_DIR="/var/lib/scratchpkg/index"
+PKGDB_DIR="$(pkgadd --print-dbdir)"
 SEARCH_DIRS="/bin /usr/bin /sbin /usr/sbin /lib /usr/lib /lib64 /usr/lib64 /usr/libexec"
 
 parse_opt $(extract_opts "$@")
@@ -175,7 +180,7 @@ if [ "$(id -u)" != 0 ] && [ "$REBUILD" = 1 ]; then
 	exit 1
 fi
 
-if [ "$PKG" ] && [ ! -f "$INDEX_DIR/$PKG/.files" ]; then
+if [ "$PKG" ] && [ ! -f "$PKGDB_DIR/$PKG/.files" ]; then
 	echo "ERROR: Package '$PKG' not installed"
 	cleanup
 	exit 1
@@ -250,7 +255,7 @@ if [ "$PKG" ]; then
 		filterdir=cat
 	fi
 	printf "Find '$PKG' files... "
-	sed 's/^/\//' $INDEX_DIR/$PKG/.files | grep $gx | $filterfile | $filterdir > $FILE_LIST
+	sed 's/^/\//' $PKGDB_DIR/$PKG/.files | grep $gx | $filterfile | $filterdir > $FILE_LIST
 else
 	printf "Find all files... "
 	find $SEARCH_DIRS $EXCLUDED_DIRS $EXCLUDED_FILES -type f \( -perm /+u+x -o -name '*.so' -o -name '*.so.*' \) -print 2> /dev/null | sort -u > $FILE_LIST
@@ -279,7 +284,7 @@ while read -r line; do
 				LIB_NAME=$NEW_LIB_NAME
 				[ "$LIB_NAME" ] || continue
 				PKG_NAME=$(echo $line | sed 's#^/##')
-				PKG_NAME=$(grep -Rx $PKG_NAME "$INDEX_DIR"/*/.files | cut -d : -f1)
+				PKG_NAME=$(grep -Rx $PKG_NAME "$PKGDB_DIR"/*/.files | cut -d : -f1)
 				[ "$PKG_NAME" ] || continue
 				PKG_NAME=$(dirname $PKG_NAME)
 				PKG_NAME=$(basename $PKG_NAME)
diff --git a/scratch b/scratch
index 7629884..0335170 100755
--- a/scratch
+++ b/scratch
@@ -91,12 +91,12 @@ vercomp() {
 
 installed_pkg_info() {	
 	if isinstalled $2; then
-		grep ^$1 $INDEX_DIR/$2/.pkginfo | cut -d " " -f3-
+		grep ^$1 $PKGDB_DIR/$2/.pkginfo | cut -d " " -f3-
 	fi
 }
 
 allinstalled() {	
-	grep ^name "$INDEX_DIR"/*/.pkginfo | awk '{print $3}'
+	grep ^name "$PKGDB_DIR"/*/.pkginfo | awk '{print $3}'
 }
 
 deps_alias() {
@@ -151,7 +151,7 @@ needarg() {
 }
 
 isinstalled() {
-	if [ -s "$INDEX_DIR/$1/.pkginfo" ] && [ "$(grep $1 $INDEX_DIR/$1/.pkginfo)" ]; then
+	if [ -s "$PKGDB_DIR/$1/.pkginfo" ] && [ "$(grep $1 $PKGDB_DIR/$1/.pkginfo)" ]; then
 		return 0
 	else
 		return 1
@@ -165,8 +165,8 @@ settermtitle() {
 scratch_integrity() {
 	if [ "$1" ]; then
 		cd /
-			if [ -f $INDEX_DIR/$1/.files ]; then
-				cat $INDEX_DIR/$1/.files | while read -r line; do
+			if [ -f $PKGDB_DIR/$1/.files ]; then
+				cat $PKGDB_DIR/$1/.files | while read -r line; do
 					if [ ! -e "$line" ]; then
 						if [ -L "$line" ]; then
 							printf "${YELLOW}broken symlink${CRESET} $1: /$line"
@@ -183,7 +183,7 @@ scratch_integrity() {
 	else
 		cd /
 			for pkg in $(allinstalled); do
-				cat $INDEX_DIR/$pkg/.files | while read -r line; do
+				cat $PKGDB_DIR/$pkg/.files | while read -r line; do
 					if [ ! -e "$line" ]; then
 						if [ -L "$line" ]; then
 							echo "broken symlink $pkg: /$line"
@@ -202,10 +202,10 @@ scratch_lock() {
 	for pkg in "$@"; do
 		if ! isinstalled $pkg; then
 			msgerr "Package '$pkg' is not installed."
-		elif [ -f $INDEX_DIR/$pkg/.lock ]; then
+		elif [ -f $PKGDB_DIR/$pkg/.lock ]; then
 			msgerr "Package '$pkg' already locked."
 		else
-			touch $INDEX_DIR/$pkg/.lock && msg "Successfully locked package '$pkg'."
+			touch $PKGDB_DIR/$pkg/.lock && msg "Successfully locked package '$pkg'."
 		fi
 	done	
 }
@@ -222,10 +222,10 @@ scratch_unlock() {
 	for pkg in "$@"; do
 		if ! isinstalled $pkg; then
 			msgerr "Package '$pkg' is not installed."
-		elif [ ! -f $INDEX_DIR/$pkg/.lock ]; then
+		elif [ ! -f $PKGDB_DIR/$pkg/.lock ]; then
 			msgerr "Package '$pkg' is not locked."
 		else
-			rm -f $INDEX_DIR/$pkg/.lock && msg "Successfully unlocked package '$pkg'."
+			rm -f $PKGDB_DIR/$pkg/.lock && msg "Successfully unlocked package '$pkg'."
 		fi
 	done	
 }
@@ -279,7 +279,7 @@ scratch_trigger() {
 post_triggers() {
 	if [ "$trig_12" = 1 ]; then
 		echo "trigger: Running mkdirs..."
-		for mkd in $INDEX_DIR/*/.pkgmkdirs; do
+		for mkd in $PKGDB_DIR/*/.pkgmkdirs; do
 			[ -s $mkd ] || continue
 			grep -Ev '^(#|$)' $mkd | while read -r dir mode uid gid junk; do
 				if [ -e "$dir" ]; then
@@ -370,7 +370,7 @@ pre_triggers() {
 	# mime db
 	if [ "$trig_1" != "1" ]; then
 		for pkg in $@; do
-			if [ -s "$INDEX_DIR/$pkg/.files" ] && [ "$(grep ^usr/share/mime/$ $INDEX_DIR/$pkg/.files)" ]; then
+			if [ -s "$PKGDB_DIR/$pkg/.files" ] && [ "$(grep ^usr/share/mime/$ $PKGDB_DIR/$pkg/.files)" ]; then
 				trig_1=1
 				break
 			fi
@@ -380,7 +380,7 @@ pre_triggers() {
 	# desktop db
 	if [ "$trig_2" != "1" ]; then
 		for pkg in $@; do
-			if [ -s "$INDEX_DIR/$pkg/.files" ] && [ "$(grep ^usr/share/applications/$ $INDEX_DIR/$pkg/.files)" ]; then
+			if [ -s "$PKGDB_DIR/$pkg/.files" ] && [ "$(grep ^usr/share/applications/$ $PKGDB_DIR/$pkg/.files)" ]; then
 				trig_2=1
 				break
 			fi
@@ -390,7 +390,7 @@ pre_triggers() {
 	# mkfontdir
 	if [ "$trig_3" != "1" ]; then
 		for pkg in $@; do
-			if [ -s "$INDEX_DIR/$pkg/.files" ] && [ "$(grep ^usr/share/fonts/$ $INDEX_DIR/$pkg/.files)" ]; then
+			if [ -s "$PKGDB_DIR/$pkg/.files" ] && [ "$(grep ^usr/share/fonts/$ $PKGDB_DIR/$pkg/.files)" ]; then
 				trig_3=1
 				break
 			fi
@@ -400,7 +400,7 @@ pre_triggers() {
 	# hwdb
 	if [ "$trig_4" != "1" ]; then
 		for pkg in $@; do
-			if [ -s "$INDEX_DIR/$pkg/.files" ] && [ "$(grep ^etc/udev/hwdb.d/$ $INDEX_DIR/$pkg/.files)" ]; then
+			if [ -s "$PKGDB_DIR/$pkg/.files" ] && [ "$(grep ^etc/udev/hwdb.d/$ $PKGDB_DIR/$pkg/.files)" ]; then
 				trig_4=1
 				break
 			fi
@@ -410,7 +410,7 @@ pre_triggers() {
 	# icon caches
 	if [ "$trig_5" != "1" ]; then
 		for pkg in $@; do
-			if [ -s "$INDEX_DIR/$pkg/.files" ] && [ "$(grep ^usr/share/icons/$ $INDEX_DIR/$pkg/.files)" ]; then
+			if [ -s "$PKGDB_DIR/$pkg/.files" ] && [ "$(grep ^usr/share/icons/$ $PKGDB_DIR/$pkg/.files)" ]; then
 				trig_5=1
 				break
 			fi
@@ -420,7 +420,7 @@ pre_triggers() {
 	# gtk3 immodules
 	if [ "$trig_6" != "1" ]; then
 		for pkg in $@; do
-			if [ -s "$INDEX_DIR/$pkg/.files" ] && [ "$(grep ^usr/lib/gtk-3.0/3.0.0/immodules/.*.so $INDEX_DIR/$pkg/.files)" ]; then
+			if [ -s "$PKGDB_DIR/$pkg/.files" ] && [ "$(grep ^usr/lib/gtk-3.0/3.0.0/immodules/.*.so $PKGDB_DIR/$pkg/.files)" ]; then
 				trig_6=1
 				break
 			fi
@@ -430,7 +430,7 @@ pre_triggers() {
 	# gtk2 immodules
 	if [ "$trig_7" != "1" ]; then
 		for pkg in $@; do
-			if [ -s "$INDEX_DIR/$pkg/.files" ] && [ "$(grep ^usr/lib/gtk-2.0/2.10.0/immodules/.*.so $INDEX_DIR/$pkg/.files)" ]; then
+			if [ -s "$PKGDB_DIR/$pkg/.files" ] && [ "$(grep ^usr/lib/gtk-2.0/2.10.0/immodules/.*.so $PKGDB_DIR/$pkg/.files)" ]; then
 				trig_7=1
 				break
 			fi
@@ -440,7 +440,7 @@ pre_triggers() {
 	# gsettings schema
 	if [ "$trig_8" != "1" ]; then
 		for pkg in $@; do
-			if [ -s "$INDEX_DIR/$pkg/.files" ] && [ "$(grep ^usr/share/glib-2.0/schemas/$ $INDEX_DIR/$pkg/.files)" ]; then
+			if [ -s "$PKGDB_DIR/$pkg/.files" ] && [ "$(grep ^usr/share/glib-2.0/schemas/$ $PKGDB_DIR/$pkg/.files)" ]; then
 				trig_8=1
 				break
 			fi
@@ -450,7 +450,7 @@ pre_triggers() {
 	# gio modules
 	if [ "$trig_9" != "1" ]; then
 		for pkg in $@; do
-			if [ -s "$INDEX_DIR/$pkg/.files" ] && [ "$(grep ^usr/lib/gio/modules/.*.so $INDEX_DIR/$pkg/.files)" ]; then
+			if [ -s "$PKGDB_DIR/$pkg/.files" ] && [ "$(grep ^usr/lib/gio/modules/.*.so $PKGDB_DIR/$pkg/.files)" ]; then
 				trig_9=1
 				break
 			fi
@@ -460,7 +460,7 @@ pre_triggers() {
 	# gdk-pixbuf
 	if [ "$trig_10" != "1" ]; then
 		for pkg in $@; do
-			if [ -s "$INDEX_DIR/$pkg/.files" ] && [ "$(grep ^usr/lib/gdk-pixbuf-2.0/2.10.0/loaders/.*.so $INDEX_DIR/$pkg/.files)" ]; then
+			if [ -s "$PKGDB_DIR/$pkg/.files" ] && [ "$(grep ^usr/lib/gdk-pixbuf-2.0/2.10.0/loaders/.*.so $PKGDB_DIR/$pkg/.files)" ]; then
 				trig_10=1
 				break
 			fi
@@ -470,7 +470,7 @@ pre_triggers() {
 	# font caches
 	if [ "$trig_11" != "1" ]; then
 		for pkg in $@; do
-			if [ -s "$INDEX_DIR/$pkg/.files" ] && [ "$(grep ^usr/share/fonts/$ $INDEX_DIR/$pkg/.files)" ]; then
+			if [ -s "$PKGDB_DIR/$pkg/.files" ] && [ "$(grep ^usr/share/fonts/$ $PKGDB_DIR/$pkg/.files)" ]; then
 				trig_11=1
 				break
 			fi
@@ -480,7 +480,7 @@ pre_triggers() {
 	# makedirs
 	if [ "$trig_12" != "1" ]; then
 		for pkg in $@; do
-			if [ -s "$INDEX_DIR/$pkg/.pkgmkdirs" ]; then
+			if [ -s "$PKGDB_DIR/$pkg/.pkgmkdirs" ]; then
 				trig_12=1
 				break
 			fi
@@ -689,7 +689,7 @@ scratch_remove() {
 
 outdatepkg() {
 	for pkg in $(allinstalled); do
-		if [ ! -e "$INDEX_DIR/$pkg/.lock" ] && getportpath $pkg >/dev/null; then
+		if [ ! -e "$PKGDB_DIR/$pkg/.lock" ] && getportpath $pkg >/dev/null; then
 			. $(getportpath $pkg)/$BUILD_SCRIPT
 			if [ -z "$name" ] || [ -z "$version" ]; then
 				continue
@@ -895,7 +895,7 @@ scratch_outdate() {
 			fi
 			iversion=$(installed_pkg_info version $pkg)
 			irelease=$(installed_pkg_info release $pkg)
-			[ -f "$INDEX_DIR/$pkg/.lock" ] && ITSLOCK="[locked]"
+			[ -f "$PKGDB_DIR/$pkg/.lock" ] && ITSLOCK="[locked]"
 			outdatemsg="$name $iversion-$irelease => $version-$release $ITSLOCK"
 			newerinstmsg="$name $iversion-$irelease => $version-$release [newer installed] $ITSLOCK"
 			if [ "$version" !=  "$iversion" ]; then
@@ -1239,7 +1239,7 @@ scratch_info() {
 scratch_installed() {
 	for all in $(allinstalled); do		
 		printf "%s" "$all "
-		grep -e ^version -e ^release $INDEX_DIR/$all/.pkginfo | awk '{print $3}' | tr '\n' '-' | sed 's:\-$::'
+		grep -e ^version -e ^release $PKGDB_DIR/$all/.pkginfo | awk '{print $3}' | tr '\n' '-' | sed 's:\-$::'
 		echo
 	done
 }
@@ -1267,7 +1267,7 @@ scratch_missingdep() {
 
 scratch_locked() {
 	for pkg in $(allinstalled); do
-		[ -f "$INDEX_DIR/$pkg/.lock" ] && echo "$pkg"
+		[ -f "$PKGDB_DIR/$pkg/.lock" ] && echo "$pkg"
 	done
 }
 
@@ -1296,8 +1296,8 @@ scratch_path() {
 scratch_provide() {
 	needarg $@
 	arg=$(echo $1 | sed "s/^\///")
-	grep -R "$arg" $INDEX_DIR/*/.files \
-	| sed "s:$INDEX_DIR/::" \
+	grep -R "$arg" $PKGDB_DIR/*/.files \
+	| sed "s:$PKGDB_DIR/::" \
 	| sed "s:/.files::" \
 	| tr : " " \
 	| column -t
@@ -1320,7 +1320,7 @@ scratch_readme() {
 scratch_files() {	
 	needarg $@
 	if isinstalled $1; then
-		cat "$INDEX_DIR/$1/.files"
+		cat "$PKGDB_DIR/$1/.files"
 	else
 		msg "Package '$1' not installed."
 	fi	
@@ -1396,6 +1396,12 @@ print_runhelp_msg() {
 	exit 2
 }
 
+# check for 'pkgadd', required for package database path
+command -v pkgadd >/dev/null 2>&1 || {
+	echo "'pkgadd' not found in \$PATH!"
+	exit 1
+}
+
 mode=$1
 
 [ "$mode" ] || {
@@ -1422,7 +1428,7 @@ for opt in $@; do
 done
 
 BUILD_SCRIPT="spkgbuild"
-INDEX_DIR="/var/lib/scratchpkg/index"
+PKGDB_DIR="$(pkgadd --print-dbdir)"
 REPO_FILE="${REPO_FILE:-/etc/scratchpkg.repo}"
 ALIAS_FILE="${ALIAS_FILE:-/etc/scratchpkg.alias}"