https://hydra.nixos.org/build/162054046
This blocks the nixpkgs-21.11-darwin channel.

It was retried a few times on Hydra. Someone with a compatible machine needs to look into this, I expect. I tried simple manual eval-only bisection (hopefully without a mistake):

There are only 'skip'ped commits left to test.
The first bad commit could be any of:
6e0b7f0
065d1fa
4ce0b95
ee8ff1d
017fb54
4ef54c9
5a9a0b1
717b53d
6eb08df
ba90604
0350e81
72121eb
0f4ec0a
9eeff75
66d2a5c
9ce2035
8c68c6f
c0ce302
065fec4
72ac7ea
c1968ed
a4a0442
We cannot bisect more!

and I can't see a clear candidate on the list of commits.