Hello, It looks like the test guix-download.sh fails due to unwanted success when the user's ISP is being "friendly" and redirects to a help page when a non-existing domain is requested. Log file: + guix download --version guix download (GNU Guix) 0.6 Copyright (C) 2014 the Guix authors License GPLv3+: GNU GPL version 3 or later This is free software: you are free to change and redistribute it. There is NO WARRANTY, to the extent permitted by law. + guix download http://does.not/exist accepted connection from pid 8210, uid 1000 starting download of `guix-file.u5jS7M' from `http://does.not/exist'... following redirection to `http://navigationshilfe1.t-online.de/dnserror?url=http://does.not/'... http://navigationshilfe1.t-online.de/.../dnserror 0.5 KiB transferred /home/tub/media/src/guix/test-tmp/store/xp2ikq7k1nqjhqwqh8w2zd5vfbwiminn-exist 1r5brk1scchyraimnpvc8lx7lqiiryv31f198hcwv9b72v5mjkfj + false 1 operations