We have also run into this issue with spotify and similar unfree / non-redistributable packages. The consensus last time we had upstream URLs disappear was that it is not permissible to cache and redistribute even the original source.
There may be a partial solution for this problem, but it will not solve the issue for nonfree packages. On Sun, May 8, 2016 at 10:11 AM Игорь Пашев <pashev.i...@gmail.com> wrote: > Can't be nix cache used for this? Source tarballs are kind of derivation > too. > _______________________________________________ > nix-dev mailing list > nix-dev@lists.science.uu.nl > http://lists.science.uu.nl/mailman/listinfo/nix-dev >
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