enable aarch64-darwin in release.nix

[kloenk]

This enables aarch64-darwin builds, on top of nixpkgs-21.05-small (NixOS/nixpkgs#105026)

[kloenk]

I tested to build hello in nix repl on my m1 MBP. Hello was produced as aarch64-darwin binary, so it's working

[edolstra]

I don't know if this will work, given that the 2.3 branch is built against Nixpkgs 20.03: https://hydra.nixos.org/jobset/nix/maintenance-2.3#tabs-configuration

[domenkozar]

Could we bump that to 21.05?

[kloenk]

I don't know if this will work, given that the 2.3 branch is built against Nixpkgs 20.03: https://hydra.nixos.org/jobset/nix/maintenance-2.3#tabs-configuration

It would not work. So we would have to bump that to 21.05. Or back port aarch64-darwin support, but I don't think that is a good idea.

[nixos-discourse]

This pull request has been mentioned on NixOS Discourse. There might be relevant details there:

https://discourse.nixos.org/t/nix-macos-monthly/12330/6

[jonringer]

nix-2.3.12 can built against 21.05. It was needed for nixos-homepage

[domenkozar]

Note that this is the last step needed to get out-of-the-box Apple Silicon support in Nix.

@kloenk could you rebase?

[kloenk]

Will rebase tomorrow

[kloenk]

nix rebased, now building the rebased nix. Will report if it works as edit to this comment.

EDIT: works well on my machine (unstable daemon).

[domenkozar]

@edolstra shall we give it a go and see what hydra says?

[domenkozar]

@kloenk you also need to add aarch64-darwin to line 318.

[kloenk]

@domenkozar:
Thanks, fixed

[domenkozar]

@edolstra any objections to merge this and see if it works?

[edolstra]

Yes, we can try. Though ideally we shouldn't change the Nixpkgs branch for a stable Nix release, since it could cause incompatible changes in the Nix binary tarballs that we provide (e.g. a Glibc upgrade causing NSS problems).

[domenkozar]

I wonder if we could test how old glibc it supports?

[domenkozar]

@kloenk there's an evaluation error for installerScript: https://hydra.nixos.org/eval/1676684#tabs-errors

[jonringer]

Will probably have to make the fixes in nixpkgs, then update the reference to nixpkgs which is able to evalutate for the new platforms, I had to do something similar for fixing staging-next tarball.
NixOS/nixpkgs#125842
NixOS/nixpkgs#125993

[domenkozar]

Ah, the channel is hardcoded in Hydra and I don't have permissions for nix project.

@edolstra could you set 21.05 channel at https://hydra.nixos.org/jobset/nix/maintenance-2.3#tabs-configuration

[edolstra]

Done.