diff --git a/precise/host/hooks/install.d/70-0k.sh b/precise/host/hooks/install.d/70-0k.sh
index e0fc73a..1903a6c 100755
--- a/precise/host/hooks/install.d/70-0k.sh
+++ b/precise/host/hooks/install.d/70-0k.sh
@@ -159,8 +159,9 @@ else
     fi
     deactivate
 
-    if ! grep "^. /opt/venv/docker-compose/bin/activate$" /etc/compose.local.conf >/dev/null 2>&1; then
-        cat <<EOF >> /etc/compose.local.conf
+    mkdir -p /etc/compose
+    if ! grep "^. /opt/venv/docker-compose/bin/activate$" /etc/compose/local.conf >/dev/null 2>&1; then
+        cat <<EOF >> /etc/compose/local.conf
 . /opt/venv/docker-compose/bin/activate
 EOF
     fi
@@ -172,20 +173,25 @@ if ! [ -d "/opt/apps/0k-compose" ]; then
 fi
 [ -e /usr/local/bin/compose ] || ln -sfv /opt/apps/0k-compose/bin/compose /usr/local/bin/
 
+cat <<EOF > /etc/default/datastore
+DATASTORE=/srv/datastore
+SNAPSHOT_BACKUP=/var/backups/snapshot
+EOF
 
-cat <<EOF > /etc/compose.conf
+cat <<EOF > /etc/default/compose
 
 ## if not provided, this will be the default service launched.
 export DEFAULT_SERVICES=""
 
 export DEFAULT_PROJECT_NAME=$(hostname | cut -f 2 -d . )
 
-export DOCKERSTORE=/srv/datastore
-export DATASTORE=$DOCKERSTORE/data
-export CONFIGSTORE=$DOCKERSTORE/config
+export DOCKER_DATASTORE=\$([ -e /etc/default/datastore ] && . /etc/default/datastore && echo \$DATASTORE)
+export DATASTORE=\$DOCKER_DATASTORE/data
+export CONFIGSTORE=\$DOCKER_DATASTORE/config
 
 EOF
 
-mkdir -p /etc/compose
 
-echo "DEFAULT_COMPOSE_FILE=/etc/compose/compose.yml" >> /etc/compose.local.conf
+echo "DEFAULT_COMPOSE_FILE=/etc/compose/compose.yml" >> /etc/compose/local.conf
+
+