sftp remote to specified folder : "too many colons in address"

[sheepdestroyer]

rclone 1.38

I want to create a mount to a sftp remote with a different folder than the user's login folder by specifying the path as hostname:path but I get the error message : "too many colons in address".

For instance, with the root user, by only specifying the hostname, I would normally get a remote to /root/, but in order to get to /, I would like to be able to specify hostname:/ or hostname:~/../ in the mount command