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Drop x86_64-darwin from the Nix flake to fix Nix CI - #2330
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theangelperalta merged 1 commit intoOct 3, 2026
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Nixpkgs 26.11 no longer supports x86_64-darwin. Since the flake.lock update in lem-project#2315 pulled it in, `nix flake check --all-systems` fails to evaluate on every CI runner. Remove the system from the flake and the optional Intel Mac target from Nix CI, which would fail the same way. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
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Problem
Nix CI has failed on every commit to
mainsince #2315 (ef6c48eb5), and on every PR. The failure is in theCheck flakestep, before anything is built:#2315 updated
flake.lock, which movednixpkgs-unstableonto 26.11. The flake still listsx86_64-darwininsystems, and CI runsnix flake check --all-systems, so evaluation fails on every runner, including Linux.Change
flake.nix: removex86_64-darwinfromsystems..github/workflows/ci.yml: remove the optionalmacos-15-inteltarget (only added viaworkflow_dispatch), which would fail the same way, and update the input description.Intel Mac users can still build Lem without Nix. They can also pin an older nixpkgs if they need the flake. If keeping Intel Mac support in the flake matters, the alternative is pinning
nixpkgsto a pre-26.11 revision instead, but that holds back every other platform.Testing
I don't have Nix locally, so this PR's own Nix CI run is the test.
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