Dash Deployment Server environment variable setting

Trying to deploy to an enterprise Dash deployment server gives me, at the time of setting envvars, the remote: unknown shorthand flag: 'e' in -e error message. This is known to me from Docker, which now prefers --env. Is this a familiar/known problem, or is there an issue at our end?

Currently Dockerfile based deploys aren’t supported on DDS and they will lead to the error mentioned above.