diff --git a/publish.sh b/publish.sh
index 78268c8c..6cd4bfe9 100755
--- a/publish.sh
+++ b/publish.sh
@@ -1,6 +1,6 @@
 #!/usr/bin/env bash
 
-set -uex
+set -e
 
 SITE_ENV="prod"
 REPO=`git config remote.origin.url`
@@ -8,19 +8,27 @@ SSH_REPO=${REPO/https:\/\/github.com\//git@github.com:}
 SHA=`git rev-parse --verify HEAD`
 SOURCE_BRANCH="source"
 TARGET_BRANCH="master"
+BUILD_DIR=".build"
 
-# Build front-end assets.
+# Prepare the build directory.
+mkdir -p $BUILD_DIR
+cp -R .git $BUILD_DIR
+pushd $BUILD_DIR
+git checkout $TARGET_BRANCH || git checkout --orphan $TARGET_BRANCH
+rm -r **/* || exit 0
+popd
+
+# Re-generate the site.
 npm run prod
-
-git config --local user.email "oliver@oliverdavies.uk"
-
 vendor/bin/sculpin generate --no-interaction --clean --env=${SITE_ENV}
 touch output_${SITE_ENV}/.nojekyll
 
 # Add, commit and push the changes.
-cd output_${SITE_ENV}
-cp -R ../.git .
-git checkout -f $TARGET_BRANCH || git checkout --orphan $TARGET_BRANCH
+mv output_${SITE_ENV}/* $BUILD_DIR
+pushd $BUILD_DIR
 git add --all .
-git commit -m "Re-generate site. $SHA"
+git commit -m "Re-generate site: $SHA"
 git push $SSH_REPO $TARGET_BRANCH
+popd
+
+rm -rf $BUILD_DIR