Cargo build yields a sha256 mismatch

[ghost]

Using:

$ nix-shell -p cargo

I get the following:

output path ‘/nix/store/qmp7gabngcaqvndl5andafpvispi90mb-cargo-d814fcb’ should have r:sha256 hash ‘0sppd3x2cacmbnypcjip44amnh66lrrbwwzsbz8rqf3nq2ah496x’, instead has ‘1c9h5qiwfq0f7z9rpfkl23il4qlfm6bk97c78gk7ish6gsy9c1d7’
cannot build derivation ‘/nix/store/bcin2sfxmgjm3f8j9jxkcpykihcclj18-cargo-2015-05-13.drv’: 1 dependencies couldn't be built

Nix 1.9 on Ubuntu.

CC maintainer @wizeman

[andrewrk]

Just got the same thing on nixos:

 97 41.2M   97 40.1M    0     0  3017k      0  0:00:14  0:00:13  0:00:01 3012koutput path ‘/nix/store/qmp7gabngcaqvndl5andafpvispi90mb-cargo-d814fcb’ should have r:sha256 hash ‘0sppd3x2cacmbnypcjip44amnh66lrrbwwzsbz8rqf3nq2ah496x’, instead has ‘1c9h5qiwfq0f7z9rpfkl23il4qlfm6bk97c78gk7ish6gsy9c1d7’

version 15.06pre64423.4e5e441 (Dingo) attempting to upgrade to nixos-15.06pre65267.6ad8fab

[globin]

I have another different hash:
053rvkjqn9ry2hqryy05kqps6i73wg126a3dvschzgkym09kr1r6

[wizeman]

See #8862. I think the best fix for now is to remove leaveDotGit, since it's causing lots of hash mismatches and it doesn't seem to be needed for anything too important. I will fix it ASAP.