bug#21788: Cannot build xz (download returns 403)

[Jan Synáček]

I cannot build xz with guix 0.8.3:

$ guix build xz
...
ERROR: download failed "http://tukaani.org/xz/xz-5.0.4.tar.gz" 403 "Forbidden"
...

I'm not sure if this can be solved by contacting the admin of that web, but I guess that bumping xz version to at least 5.0.8 (I checked it was possible to download this one) could fix this problem.

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Jan Synáček