Error: Unable to locate executable file: cachix.

[rvolosatovs]

Error: Unable to locate executable file: cachix.

[Gerschtli]

This is not an issue with this action. The latest nix release (2.14.0) has a regression which causes this.

Pinning nix version in the nix-install-action resolves it:

install_url: https://releases.nixos.org/nix/nix-2.13.3/install

See NixOS/nixpkgs#218858 (comment)

[dpc]

I forgot to post an update. I fixed it couple of hours after posting.

This was caused by GH action runner wiping the environment on start, discarding Nix environment. It's weird because it works fine on Linux, in similar setup. I think it's because shell is not being used to invoke commands on MacOS, while it is on Linux, or because DeterminateSystems installer is wiring things up differently between the two for some reason.

The fix was to run ./env.sh after sourcing Nix init script to update .env and .path inside the runner's dir, before calling ./run.sh.

[rsdy]

I'm seeing the same thing.

[ehildenb]

We're seeing the same thing: https://github.com/runtimeverification/evm-semantics/actions/runs/4296996503/jobs/7489418708

I've tried version 14 and version 15 of the action.

[rvolosatovs]

This is not an issue with this action. The latest nix release (2.14.0) has a regression which causes this.

Pinning nix version in the nix-install-action resolves it:

install_url: https://releases.nixos.org/nix/nix-2.13.3/install

See NixOS/nixpkgs#218858 (comment)

Thank you! This solved my issue, closing

[dpc]

I see the same thing on a self-hosted macos runner and I don't even know why. How does one debug this?

[sandydoo]

I see the same thing on a self-hosted macos runner and I don't even know why. How does one debug this?

This usually means that we can't find the cachix executable in your PATH. You can start tracking this down by echo-ing PATH during the workflow and making sure that it contains paths to the system/user nix profiles.
I would recommend pre-installing cachix if using a self-hosted runner.