Unable to deploy stack when using together with stack.env

[theksk23]

If you try using relative pathes from git together with environment-variables from stack.env you end up with the following:

an error occurred while running unpacker container with exit code 255: open /mnt/portainer-mounts/foo/bar/portainer-compose-unpacker/stacks/bar/bar/stack.env: no such file or directory 

The unpacker seems to take docker-compose.yml env_file: stack.env and adds it to its list-of-files to verify or so?
It does not exist of course, so we run into a failure deploying the stack

Adding the file to git will end up overwriting the values set in Portainer UI.