Nixpkgs version

• Unstable (25.11)

Steps to reproduce

build nix on current master for aarch64-darwin

Can Hydra reproduce this build failure?

Yes, Hydra can reproduce this build failure.

Link to Hydra build job

https://hydra.nixos.org/build/301007566

Relevant log output

FAILED: src/nix-manual/conf-file.json 
/nix/store/adj7972a9yk3rd3dv406zgy7w9h608gg-meson-1.8.0/bin/meson --internal exe --unpickle /private/tmp/nix-build-nix-2.28.3.drv-0/source/build/meson-private/meson_exe_nix_04e1231214654a7343d50b5cc8b60c60d3ca2d23.dat
while executing ['/private/tmp/nix-build-nix-2.28.3.drv-0/source/build/src/nix/nix', '--experimental-features', 'nix-command', 'config', 'show', '--json']
--- stderr ---

Additional context

No response

System metadata

• system: "aarch64-darwin"
• host os: Darwin 24.5.0, macOS 15.5
• multi-user?: yes
• sandbox: no
• version: nix-env (Nix) 2.28.3
• channels(root): "nixpkgs"
• nixpkgs: /nix/store/jvc4wm562r4l4b3k6bw40fyilxnpbnyz-source

Notify maintainers

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I assert that this issue is relevant for Nixpkgs

• I assert that this is a bug and not a support request.
• I assert that this is not a duplicate of an existing issue.
• I assert that I have read the NixOS Code of Conduct and agree to abide by it.

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