@GrahamcOfBorg eval

It's not clear to me that 1.30 is purely a bug fix release. I'd rather not have non-bug fix updates on the release branch, especially when they're stdenv changes.

@edolstra understandable. My sense is that it's mostly bugfix, with the only new feature being a --warnings command-line option. My motivation for putting it here is that if we're going to put out a Nix 1.12 pointing at a 17.09 stable on Darwin, I'd like it to include a gnutar that can produce cross-platform deterministic tarballs, and this is the first version to include that fix. It also natively includes a CVE patch that we were applying manually and a couple of other fixes, but indeed it does seem to have one new feature. If you still think it's a bad idea, I won't put up a fight.

Closing because of inactivity.