diff --git a/sabayon-maint-helper b/sabayon-maint-helper
new file mode 100755
index 0000000..4bfd979
--- /dev/null
+++ b/sabayon-maint-helper
@@ -0,0 +1,89 @@
+#!/bin/bash
+set -e
+. /sbin/sabayondevkit-functions.sh
+
+help_msg() {
+
+   echo "
+ sabayon-maint-helper:
+
+Script for builder boxes maintenance.
+
+-h|--help        This message.
+--installed      Upgrades all the packages installed in the box.
+--obsolete       Upgrades ONLY the packages that are listed obsolete in eix-test-obsolete.
+--all            Tries to upgrade all package without any euristics
+--category       Tries to upgrade/install all the packages in the specified category
+                 e.g. sabayon-maint-helper "app-office"
+
+Some options could be set also as environment variables:
+EMERGE_DEFAULT_ARGS     Default emerge options
+
+NOTE: This script MUST be execute as root.
+"
+}
+
+
+parse_args() {
+
+   local short_opts="h"
+   local long_opts="help arch: host-arch: unprivileged stagingdir: image-descr: image:"
+
+   $(set -- $(getopt -u -q -a -o "$short_opts" -l "$long_opts" -- "$@"))
+
+   while [ $# -gt 0 ] ; do
+      case "$1" in
+
+         -h|--help)
+            help_msg
+            exit 1
+            ;;
+         --installed)
+            echo "Trying to upgrade all the installed packages"
+            rebuild_all
+            shift
+            ;;
+         --obsolete)
+            echo "Upgrading the packages that are marked as obsolete"
+            build_obsolete
+            shift
+            ;;
+         --all)
+            echo "Upgrading/Installing everything available to install"
+            build_all_availables
+            ;;
+         --category)
+            echo "Upgrading/Installing everything inside the '$2' category"
+            build_category_installed "$2"
+            ;;
+         --)
+            help_msg
+            exit 1
+            ;;
+         *)
+            echo "Invalid parameter $1."
+            exit 1
+            ;;
+
+      esac
+
+      shift
+   done
+
+   return 0
+}
+
+main() {
+
+  if [ "$(id -u)" != "0" ]; then
+     echo "This script must be run as root" 1>&2
+     exit 1
+  fi
+
+  [ -z "$@" ] && help_msg && exit 1
+
+  parse_args "$@"
+
+}
+
+main "$@"
diff --git a/sabayondevkit-functions.sh b/sabayondevkit-functions.sh
index 2ca128e..9c38ed5 100644
--- a/sabayondevkit-functions.sh
+++ b/sabayondevkit-functions.sh
@@ -9,46 +9,9 @@ check_docker_requirements(){
 
 die() { echo "$@" 1>&2 ; exit 1; }
 
-build() {
-local SEARCH=$1
-local EMERGE_DEFAULT_ARGS=${2:---accept-properties=-interactive --verbose --oneshot --nospinner --noreplace --quiet-build=y --quiet-fail --fail-clean=y --complete-graph --buildpkg}
-for i in $(EIX_LIMIT=0 eix --only-names --pure-packages "$SEARCH/" | xargs echo | uniq);
-  do
-    echo "Building $i"
-    emerge $EMERGE_DEFAULT_ARGS -o $i && \
-    emerge $EMERGE_DEFAULT_ARGS $i
-  done
-}
-
-build_installed() {
-  local SEARCH=$1
-  local EMERGE_DEFAULT_ARGS=${2:---accept-properties=-interactive --newuse --noreplace --changed-use --update --verbose --oneshot --nospinner --quiet-build=y --quiet-fail --fail-clean=y --complete-graph --buildpkg}
-
-  for i in $(EIX_LIMIT=0 eix -I --only-names --pure-packages "$SEARCH/" | xargs echo | uniq);
-    do
-      echo "Building $i"
-      emerge $EMERGE_DEFAULT_ARGS $i
-    done
-}
-
-build_all_availables() {
-for i in $(cat /usr/portage/profiles/categories | xargs echo | uniq);
-  do
-    build "$i/"
-  done
-}
-
-rebuild_all() {
-for i in $(cat /usr/portage/profiles/categories | xargs echo | uniq);
-  do
-    build_installed "$i/"
-  done
-}
-
 build_sync() {
-  emerge-webrsync || exit 1
-  emerge --sync
   layman -S
+  emerge --sync
   eix-update || exit 1
   pushd /opt/sabayon-build/
     git stash
@@ -57,3 +20,65 @@ build_sync() {
     git reset --heard origin/master
   popd
 }
+
+build_category() {
+  local SEARCH=$1
+  build_sync
+  for i in $(EIX_LIMIT=0 eix --only-names --pure-packages "$SEARCH/" | xargs echo | uniq);
+    do
+      echo "Building $i"
+      emerge ${EMERGE_DEFAULT_ARGS:---accept-properties=-interactive --verbose --oneshot --nospinner --noreplace --quiet-build=y --quiet-fail --fail-clean=y --complete-graph --buildpkg} $i
+    done
+}
+
+build_obsolete() {
+  build_sync
+  for i in $(EIX_LIMIT=0 eix-test-obsolete | grep '\[U\]' | awk '{ print $2 }' | xargs echo | uniq);
+    do
+     echo "Build $i"
+     emerge ${EMERGE_DEFAULT_ARGS:---accept-properties=-interactive --verbose --oneshot --nospinner --quiet-build=y --quiet-fail --fail-clean=y --complete-graph --buildpkg --noreplace} $i
+    done
+}
+
+build_category_installed() {
+  local SEARCH=$1
+  build_sync
+  for i in $(EIX_LIMIT=0 eix -I --only-names --pure-packages "$SEARCH/" | xargs echo | uniq);
+    do
+      echo "Building $i"
+      emerge ${EMERGE_DEFAULT_ARGS:---accept-properties=-interactive --newuse --noreplace --changed-use --update --verbose --oneshot --nospinner --quiet-build=y --quiet-fail --fail-clean=y --complete-graph --buildpkg} $i
+    done
+}
+
+build_all_availables() {
+  for i in $(cat /usr/portage/profiles/categories | xargs echo | uniq);
+    do
+      build_category "$i/"
+    done
+}
+
+rebuild_all() {
+for i in $(cat /usr/portage/profiles/categories | xargs echo | uniq);
+  do
+    build_category_installed "$i/"
+  done
+}
+
+get_category() {
+  local CATEGORY=$1
+  local PACKS
+  for i in $(EIX_LIMIT=0 eix --only-names --pure-packages "$CATEGORY/" | xargs echo | uniq);
+    do
+      PACKS+="$i "
+    done
+    echo $PACKS
+}
+
+get_all_availables() {
+  local RES
+  for i in $(cat /usr/portage/profiles/categories | xargs echo | uniq);
+    do
+        RES+="$(get_category $i) "
+    done
+  echo $RES
+}