Hi!

I wanted to play with Hydra and found it did not build and so did not
some of its dependencies.

Our nix package got updated which broke the hydra build.  First I
downgraded nix to 1.8.  That worked, eventually.  We decided on #guix
that we'd rather upgrade than downgrade.

So I upgraded hydra to latest git and did not get past build problems.
The Hydra git does not mention anything on dependencies or versions.  I
asked on #guix and later on #nixos.

Finally I found this comment from last February

    https://github.com/NixOS/hydra/issues/270

    "You have to use NixUnstable or go a few Hydra commits back."

So after a couple of iterations in the Hydra git I settled on a commit
from 20151030 (just after a compile fix that I ran into).

Two perl packages did not build anymore (failing tests), so I disabled
the tests.  Hydra also has two new dependencies, which I added.

Greetings,
Jan