I got the following error when deploying.
WARNING: Executing a script that is loading libcrypto in an unsafe way. This will fail in a future version of macOS. Set the LIBRESSL_REDIRECT_STUB_ABORT=1 in the environment to force this into an error.
The deploy was not successful.
Update: after updating my keychain with
ssh-add -K I successfully deployed, but I still have the warning message about libcrypto.