nix binary not on PATH within post-build-hook script (macos)

[adrian-gierakowski]

Tried this on: macos-12 and macos-13-xlarge with identical results

I'm using default installer configuration

    - uses: DeterminateSystems/nix-installer-action@main

In following step I set post-build-hook (which invokes nix copy) in /etc/nix/nix.conf and restart nix daemon with:

sudo launchctl stop org.nixos.nix-daemon
sudo launchctl start org.nixos.nix-daemon

I then build a package with nix-build and see the following:

post-build-hook: /Users/runner/.config/nix/upload-to-cache.sh: line 28: nix: command not found
error: program '/Users/runner/.config/nix/upload-to-cache.sh' failed with exit code 127