diff --git a/scripts/build-mac.sh b/scripts/build-mac.sh
index 82cb50c5..b02c464e 100755
--- a/scripts/build-mac.sh
+++ b/scripts/build-mac.sh
@@ -15,7 +15,16 @@ if ! [ -x "$(command -v /usr/local/bin/packagesbuild)" ]; then
   exit 1
 fi
 
-nvm use default
+if ! [ -x "$(command -v gulp)" ]; then
+  echo 'Gulp does not exist! Install it for setting expiry!' >&2
+  exit 1
+fi
+
+if [ -z "$PARENT_BUILD_VERSION" ]; then
+  echo "PARENT_BUILD_VERSION is empty, setting default"
+  PARENT_BUILD_VERSION="0"
+fi
+
 NODE_VERSION=$(node --version)
 echo "Node Version: ${NODE_VERSION}"
 
@@ -35,11 +44,17 @@ echo "Setting default pod url to https://corporate.symphony.com"
 sed -i -e 's/\"url\"[[:space:]]*\:[[:space:]]*\".*\"/\"url\":\"https:\/\/corporate.symphony.com\"/g' config/Symphony.config
 # setup the build version
 echo "Setting build version to ${PARENT_BUILD_VERSION}"
-sed -i -e "s/\"buildNumber\"[[:space:]]*\:[[:space:]]*\".*\"/\"buildNumber\":\"${PARENT_BUILD_VERSION}\"/g" package.json
+sed -i -e "s/\"buildNumber\"[[:space:]]*\:[[:space:]]*\".*\"/\"buildNumber\":\" ${PARENT_BUILD_VERSION}\"/g" package.json
 # replace version number in pre-install script
 echo "Setting package version in pre install script to ${PKG_VERSION}"
 sed -i -e "s/CURRENT_VERSION=APP_VERSION/CURRENT_VERSION=${PKG_VERSION}/g" ./installer/mac/preinstall.sh
 
+if [ -z "$EXPIRY_PERIOD" ]; then
+  echo 'Expiry period not set, so, not creating expiry for the build'
+else
+  gulp setExpiry --period ${EXPIRY_PERIOD}
+fi
+
 echo "Running tests, code coverage, linting and building..."
 npm run unpacked-mac