http://hydra.nixos.org/view/nixpkgs/unstable/. So now the Nixpkgs
channel corresponds to exactly one revision of Nixpkgs (i.e. no more
binaries from previous revisions), there is some minimal assurance
that the channel is okay (because the builds in the "unstable" view
need to succeed), and older Nixpkgs pre-releases are available under
http://nixos.org/releases/nixpkgs/. This means we've come full
circle, because this is how the Nixpkgs channel used to work before
we had Hydra :-)
The downside is that it can take longer for the channel to catch up
with the Nixpkgs repository. But that's only a problem for people
who build from the Nixpkgs repository.
git-svn-id: https://nixos.org/repos/nix/release/trunk/channels@33565 70bd8c7a-acb8-0310-9f0d-9cc1c95dcdbb
