Prefer macos-13 GHA runner over macos-15 by introducing cachix

[kachick]

After GH-1235(GH-754), I may use the much slow macos-13 runner again if enabling the binary cache for darwin.

Partially revert GH-1165(GH-1164)
Might related to GH-1167, GH-1198, GH-911

[kachick]

Why there is no nushell binary cache on darwin

Fri, 08 Aug 2025 09:13:58 GMT
building '/nix/store/5zplwvhly99zrx9a4c6jys82381kbysn-nushell-0.104.0.drv'...

> hydra-check nushell --arch x86_64-darwin
Build Status for nushell.x86_64-darwin on jobset nixpkgs/trunk
https://hydra.nixos.org/job/nixpkgs/trunk/nushell.x86_64-darwin
✔              nushell-0.106.1  2025-07-30  https://hydra.nixos.org/build/304032505
✔              nushell-0.105.1  2025-07-28  https://hydra.nixos.org/build/303595773
⏹ (Cancelled)  nushell-0.105.1  2025-07-26  https://hydra.nixos.org/build/303304774
✔              nushell-0.105.1  2025-07-15  https://hydra.nixos.org/build/302612278
✔              nushell-0.105.1  2025-06-24  https://hydra.nixos.org/build/301167062
✔              nushell-0.104.1  2025-06-18  https://hydra.nixos.org/build/300402082
✔              nushell-0.104.1  2025-06-10  https://hydra.nixos.org/build/299921151
✖ (Failed)     nushell-0.104.1  2025-05-31  https://hydra.nixos.org/build/298872660
✔              nushell-0.104.0  2025-05-17  https://hydra.nixos.org/build/297365085
✖ (Failed)     nushell-0.104.0  2025-05-06  https://hydra.nixos.org/build/296369103

It might be different channel. nixpkgs-unstable might be better than nixos-unstable when considering darwin than now.
However nushell package is using nixpkgs-25.05-darwin channel 🤔

[kachick]

> hydra-check nushell --channel nixpkgs-25.05-darwin --arch x86_64-darwin
Build Status for nushell.x86_64-darwin on jobset nixpkgs/nixpkgs-25.05-darwin
https://hydra.nixos.org/job/nixpkgs/nixpkgs-25.05-darwin/nushell.x86_64-darwin
✔           nushell-0.104.0  2025-08-08  https://hydra.nixos.org/build/304443927
✖ (Failed)  nushell-0.104.0  2025-07-04  https://hydra.nixos.org/build/301655980
✔           nushell-0.104.0  2025-05-17  https://hydra.nixos.org/build/297712030

dotfiles/flake.lock

Line 121 in e48510b

"rev": "3535321020f5617f3ca73065118984b1325331ab",

The rev seems different, however timestamp seems this is the cause.
It might be worth to test that will be fixed or not when updating to latest flake.lock.

[kachick]

First execution

https://github.com/kachick/dotfiles/actions/runs/16826552350/job/47664270828

[kachick]

Rerun used the binary cache 31 minutes -> 7 minutes

https://github.com/kachick/dotfiles/actions/runs/16826552350/job/47666511720

Still slow than ubuntu runner, however this is the limit of the macos-13 runner

[kachick]

7 minutes is almost same of macos-15 without cachix

And this worked on my macbook. See #1238 (comment) and #1238 (comment) for detail

[kachick]

Took 100MiB, as same as Linux

[kachick]

Give it a try!

[kachick]

Suggested change

	# macos-13 is the latest x86_64-darwin runner for darwin and technically the right choice for respecting architecture of my old MacBook,
	# macos-13 is the latest x86_64-darwin runner and technically the right choice for respecting architecture of my old MacBook,

[kachick]

https://github.com/NixOS/nixpkgs/issues/405893

Minimum Version Update
As announced in the 25.05 release notes, Darwin will be updating the minimum supported version regularly going forward. 25.11 will be the first release to reflect that policy. The oldest supported release will be macOS 14.0 if it is possible to make availability warnings into errors by default.

🙄

Hmm... so, I can only use macos-13 runner only next 3 months ref: #1200

[kachick]

Taking minutes to build my own homemade packages, for example git hooks written in go.
Dropping git env from darwin is a way.
Proceed to migrate on lima more. So I want #1220 for the preparation setp.

[kachick]

Hmm... so, I can only use macos-13 runner only next 3 months ref: #1200

🎉 #1291