diff --git a/INSTALL.sh b/INSTALL.sh
index 59c90c3..a08c031 100755
--- a/INSTALL.sh
+++ b/INSTALL.sh
@@ -15,6 +15,7 @@ install -d ${DESTDIR}${REVDEPD}
 install -dm777 ${DESTDIR}${CACHE_DIR}/packages
 install -dm777 ${DESTDIR}${CACHE_DIR}/sources
 install -dm777 ${DESTDIR}${CACHE_DIR}/work
+install -dm777 ${DESTDIR}${CACHE_DIR}/log
 
 install -m755 xchroot revdep pkgadd pkgdel pkgbuild pkgquery scratch updateconf ${DESTDIR}${BINDIR}
 install -m644 scratchpkg.conf scratchpkg.repo scratchpkg.alias ${DESTDIR}${CONFDIR}
diff --git a/scratch b/scratch
index 5b09089..09acecc 100755
--- a/scratch
+++ b/scratch
@@ -481,6 +481,7 @@ scratch_build() {
 	while [ "$1" ]; do
 		case $1 in
 			-i|-u|-r|-g|-p) ;;
+			--log) LOGBUILD=1;;
 			-*) OPTS="$OPTS $1";;
 			 *) PKGNAME="$PKGNAME $1";;
 		esac
@@ -497,7 +498,12 @@ scratch_build() {
 		}
 		cd $ppath
 		settermtitle "Building $pkg..."
-		pkgbuild $OPTS || {
+		if [ "$LOGBUILD" = 1 ]; then
+			pkgbuild $OPTS | tee $LOG_DIR/$pkg.log
+		else
+			pkgbuild $OPTS
+		fi
+		[ "$?" = 0 ] || {
 			settermtitle "Building $pkg failed."
 			return 1
 		}
@@ -514,6 +520,7 @@ scratch_install() {
 			-r|--reinstall) REINSTALL=1;;
 			-y|--yes) NOCONFIRM=1;;
 			-n|--no-dep) NO_DEP=1;;
+			--log) LOGBUILD=1;;
 			--exclude=*) EXOPT=$1;;
 			-*) OPTS="$OPTS $1";;
 			*) PKGNAME="$PKGNAME $1";;
@@ -535,7 +542,12 @@ scratch_install() {
 			else
 				cd $(getportpath $ii)
 					settermtitle "Reinstalling $ii..."
-					pkgbuild $OPTS -r || {
+					if [ "$LOGBUILD" = 1 ]; then
+						pkgbuild $OPTS -r | tee $LOG_DIR/$ii.log
+					else
+						pkgbuild $OPTS -r
+					fi
+					[ "$?" = 0 ] || {
 						error=1
 						break
 					}
@@ -559,7 +571,12 @@ scratch_install() {
 			else
 				cd $(getportpath $ii)
 					settermtitle "Installing $ii..."
-					pkgbuild -i $OPTS || {
+					if [ "$LOGBUILD" = 1 ]; then
+						pkgbuild $OPTS -i | tee $LOG_DIR/$ii.log
+					else
+						pkgbuild $OPTS -i
+					fi
+					[ "$?" = 0 ] || {
 						error=1
 						break
 					}
@@ -606,7 +623,12 @@ scratch_install() {
 			if portpathh=$(getportpath $int); then
 				cd $portpathh
 					settermtitle "[ $count/$total ] installing $int..."
-					pkgbuild -i $OPTS || {
+					if [ "$LOGBUILD" = 1 ]; then
+						pkgbuild $OPTS -i | tee $LOG_DIR/$int.log
+					else
+						pkgbuild $OPTS -i
+					fi
+					[ "$?" = 0 ] || {
 						error=1
 						count=$(( count - 1 ))
 						break
@@ -700,6 +722,7 @@ scratch_sysup() {
 			-i|-u|-r) ;;
 			-y|--yes) NOCONFIRM=1;;
 			-n|--no-dep) NODEP=1;;
+			--log) LOGBUILD=1;;
 			--exclude=*) EXOPT=$1;;
 			-*) OPTS="$OPTS $1";;
 		esac
@@ -756,14 +779,24 @@ scratch_sysup() {
 		cd $(getportpath $inst)
 		if ! isinstalled $inst; then
 			settermtitle "[ $count/$total ] Installing $inst..."
-			pkgbuild -i $OPTS || {
+			if [ "$LOGBUILD" = 1 ]; then
+				pkgbuild $OPTS -i | tee $LOG_DIR/$inst.log
+			else
+				pkgbuild $OPTS -i
+			fi
+			[ "$?" = 0 ]  || {
 				error=1
 				count=$(( count - 1 ))
 				break
 			}
 		else
 			settermtitle "[ $count/$total ] Upgrading $inst..."
-			pkgbuild -u $OPTS || {
+			if [ "$LOGBUILD" = 1 ]; then
+				pkgbuild $OPTS -u | tee $LOG_DIR/$inst.log
+			else
+				pkgbuild $OPTS-u 
+			fi
+			[ "$?" = 0 ]  || {
 				error=1
 				count=$(( count - 1 ))
 				break
@@ -785,6 +818,7 @@ scratch_upgrade() {
 			-i|-r) ;;
 			-y|--yes) NOCONFIRM=1;;
 			-d|--no-dep) NO_DEP=1;;
+			--log) LOGBUILD=1;;
 			--exclude=*) EXOPT=$1;;
 			-*) OPTS="$OPTS $1";;
 			*) PKGNAME="$PKGNAME $1";;
@@ -853,14 +887,24 @@ scratch_upgrade() {
 		cd $(getportpath $inst)
 		if ! isinstalled $inst; then
 			settermtitle "[ $count/$total ] Installing $inst..."
-			pkgbuild -i $OPTS || {
+			if [ "$LOGBUILD" = 1 ]; then
+				pkgbuild $OPTS -i | tee $LOG_DIR/$inst.log
+			else
+				pkgbuild $OPTS -i
+			fi
+			[ "$?" = 0 ]  || {
 				error=1
 				count=$(( count - 1 ))
 				break
 			}
 		else
 			settermtitle "[ $count/$total ] Upgrading $inst..."
-			pkgbuild -u $OPTS || {
+			if [ "$LOGBUILD" = 1 ]; then
+				pkgbuild $OPTS -u | tee $LOG_DIR/$inst.log
+			else
+				pkgbuild $OPTS -u
+			fi
+			[ "$?" = 0 ]  || {
 				error=1
 				count=$(( count - 1 ))
 				break
@@ -1141,11 +1185,13 @@ Options:
                              -r|--reinstall   reinstall
                              -n|--no-dep      skip dependencies
                              -y|--yes         skip ask user permission
+                             --log            log build process
                              --exclude=*      exclude dependencies, comma separated
                              
     upgrade <ports> <arg>    upgrade ports (use pkgbuild arg, except '-i' & '-r')
                              -n|--no-dep      skip dependencies
                              -y|--yes         skip ask user permission
+                             --log            log build process
                              --exclude=*      exclude dependencies, comma separated
 				             
     remove  <ports> <arg>    remove installed ports (use pkgdel arg)
@@ -1154,6 +1200,7 @@ Options:
     sysup           <arg>    full system upgrade (use pkgbuild arg, except '-i', '-r'  & '-u')
                              -n|--no-dep      skip dependencies
                              -y|--yes         skip ask user permission
+                             --log            log build process
                              --exclude=*      exclude dependencies, comma separated
                              
     deplist <ports>          print all dependencies for ports
@@ -1161,6 +1208,7 @@ Options:
                              --exclude=*      exclude dependencies, comma separated
 				
     build   <ports> <arg>    build ports (use pkgbuild arg, except '-i', '-u', '-r', '-g', & '-p')
+                             --log            log build process
 
     lock    <ports>          locking ports prevent upgrade
     unlock  <ports>          unlock locked ports
@@ -1192,6 +1240,7 @@ ALIAS_FILE="/etc/scratchpkg.alias"
 # default value from pkgbuild
 SOURCE_DIR="/var/cache/scratchpkg/sources"
 PACKAGE_DIR="/var/cache/scratchpkg/packages"
+LOG_DIR="/var/cache/scratchpkg/log"
 COMPRESSION_MODE="xz"
 
 mode=$1