This test has never succeeded (http://hydra.nixos.org/job/hydra/master/tests.s3backup.x86_64-linux) so until somebody fixes it, there is not much point in building it.
F6IBTEIB5Q342R2TEWJX53MDWX2F4JS3MOCCHHUPUEFHUQ4MZV5QC
GLHKDGJ4LLKWUB6AMISXAKO7FZLOGXB4VCTYYXUANULQJOYLS6VQC
UGA45FNCYAHX77QI3MTMSRF676N2BUW2ZUUI4OZCI2C3EJOYKY3QC
YQWH4POV22KYCCKOTZXD36QKUOWEQ2DSPYPO5DNZDZ344RI25OAAC
T4LLYESZ2HUXSLKZ6GNBLVWUVG7R5IDFHYHYO773QIZ6QTOOXR2AC
--set NIX_RELEASE ${nix.name}
--set NIX_RELEASE ${nix.name or "unknown"}
/*
*/