diff --git a/ci/templates/src/compile.env.erb b/ci/templates/src/compile.env.erb
index b78a8fd..962a5bf 100644
--- a/ci/templates/src/compile.env.erb
+++ b/ci/templates/src/compile.env.erb
@@ -32,8 +32,8 @@ bosh_bundle_local() {
 bosh_generate_runtime_env() {
   mkdir -p "${BOSH_INSTALL_TARGET}/bosh"
   cat > "${BOSH_INSTALL_TARGET}/bosh/runtime.env" <<EOF
-export GEM_HOME=${BOSH_INSTALL_TARGET}/gem_home/ruby/<%= ruby_patch_version %>
-export PATH=${BOSH_INSTALL_TARGET}/bin:\${GEM_HOME}/bin:\${PATH}
-export BUNDLE_GEMFILE=${BOSH_INSTALL_TARGET}/Gemfile
+export PATH="${BOSH_INSTALL_TARGET}/bin:\${PATH}"
+export GEM_HOME="${BOSH_INSTALL_TARGET}/gem_home/ruby/$(ruby -e 'puts Gem.ruby_api_version')"
+export BUNDLE_GEMFILE="${BOSH_INSTALL_TARGET}/Gemfile"
 EOF
 }