Mirrors are not accessible without login
Let's take for example this link: https://gitlab.gnome.org/Infrastructure/Mirrors/lorry-mirrors/source_puri_sm/tar-files/-/raw/master/Librem5/feedbackd/-/archive/v0.0.0+git20210426/feedbackd-v0.0.0+git20210426.tar.bz2
I can download the tarball normally from my browser, but buildstream can't. I can't download it either from a private browsing tab (I get redirected to https://gitlab.gnome.org/users/sign_in).
I was thinking, maybe gitlab isn't the best place to put such mirrors?