diff --git a/publish.sh b/publish.sh
index 05ca1db1..e9e62264 100755
--- a/publish.sh
+++ b/publish.sh
@@ -5,26 +5,29 @@ set -e
 SITE_ENV="prod"
 REPO=`git config remote.origin.url`
 SSH_REPO=${REPO/https:\/\/github.com\//git@github.com:}
+SHA=`git rev-parse --verify HEAD`
+SOURCE_BRANCH="source"
+TARGET_BRANCH="master"
+BUILD_DIR=".build"
 
 # Prepare the build directory.
-git clone $REPO _deploy
-pushd _deploy
-git checkout master || git checkout --orphan master
+git clone $REPO $BUILD_DIR
+pushd $BUILD_DIR
+git checkout $TARGET_BRANCH || git checkout --orphan $TARGET_BRANCH
 popd
 rm -rf ${BUILD_DIR}/**/* || exit 0
 
 # Re-generate the site.
 npm run prod
-vendor/bin/sculpin generate --no-interaction --clean --env=prod
-touch output_prod/.nojekyll
+vendor/bin/sculpin generate --no-interaction --clean --env=${SITE_ENV}
+touch output_${SITE_ENV}/.nojekyll
 
 # Add, commit and push the changes.
-mv output_prod/* _deploy
-pushd _deploy
-echo "!/assets/css/
-!/assets/images/
-!/assets/js/" > .gitignore
-git add --all -f .
-git commit -m "Re-generate site: `git rev-parse --verify HEAD`"
-git push $SSH_REPO master
+mv output_${SITE_ENV}/* $BUILD_DIR
+pushd $BUILD_DIR
+git add --all .
+git commit -m "Re-generate site: $SHA"
+git push $SSH_REPO $TARGET_BRANCH
 popd
+
+rm -rf $BUILD_DIR