Loading a Baseline of a Private Project

> I'm posting this because I ran into this problem a few times and keep
> forgetting what's wrong! Hopefully, it will save someone else a
> headache :)
>
> In MyMainProject's baseline, I have:
>    baseline: 'MyPrivateDependentProject' with: [
>                 spec
>                     repository:
> 'bitbucket://SeanDeNigris/my-private-dependent-project:master/repository'
> ].
>
> Loading MyMainProject via:
>    Metacello new
>     repository: 'filetree://', (repoFolder / 'repository') fullName;
>     baseline: 'MyMainProject';
>     onConflict: [ :ex | ex allow ];
>     load.
>
> Produces: 'Error: can''t find EOCD position', because the zip archive has
> not been downloaded. As a sanity check, I replaced the bitbucket URL with
> one of a public bitbucket project, and the source downloaded successfully.
>
> So, the moral of the story, I think, is that if you want to depend on a
> private project, for which you use SSH keys to authenticate, you must
> use a
> filetree URL in your baesline and manage the cloning yourself. This is
> probably usually what you want anyway for two projects under development
> which you both control, so not a huge deal AFAICT.