Hi Hilaire,
I also use a command line handler for start in a new image with voyage . I start it like this on windows:
.\...\Pharo5.0.image --no-default-preferences eval --save " MCRepositoryGroup default addRepository: (MCHttpRepository location: '
http://smalltalkhub.com/mc/Sabine/RKA24/main' ��user: 'Sabine' ��password: 'xxx').Metacello new smalltalkhubUser: 'Sabine' project: 'RKA24'; configuration: 'RKA24'; version: #development; load".
Are you sure that the code in the file is executed? I had similar problems and asked in slack. Unfortunately the discussion is gone. It came out that some combinations of file configuration and command line commands do not work. I currently don't remember which (save?) but perhaps this brings you to an idea.
Regards
Sabine