Defaults env_keep += "FLATCAR_BUILD_ID COREOS_OFFICIAL \
                      EMAIL GIT_AUTHOR_EMAIL GIT_AUTHOR_NAME \
                      GIT_COMMITTER_EMAIL GIT_COMMITTER_NAME \
                      GIT_PROXY_COMMAND GIT_SSH RSYNC_PROXY \
                      GNUPGHOME GPG_AGENT_INFO SSH_AUTH_SOCK \
                      BOTO_PATH GOOGLE_APPLICATION_CREDENTIALS \
                      USE FEATURES PORTAGE_USERNAME FORCE_STAGES \
                      all_proxy ftp_proxy http_proxy https_proxy no_proxy"