cachix-daemon-.../post-build-hook.sh': No such file or directory

[srid]

Cachix is unable to push from inside nixos-container for whatever reason:

running post-build-hook '/run/github-runner/emanote/_temp/cachix-daemon-vy7DOb/post-build-hook.sh'...
treefmt-check (post)> error: executing '/run/github-runner/emanote/_temp/cachix-daemon-vy7DOb/post-build-hook.sh': No such file or directory

https://github.com/srid/emanote/actions/runs/7678233028/job/20928039851

(This was on a self-hosted runner)

Is there anything else I do here?

[sandydoo]

@srid, would you be able to test whether it works with useDaemon: false?

Your self-hosted runner is running inside a nixos-container, correct?

[domenkozar]

Unless we can reproduce the issue we can't really help there, I'm closing this for now.

If you hit an issue, schedule a call at https://cal.com/domenkozar and we can go deeper.

[srid]

@srid, would you be able to test whether it works with useDaemon: false?

What's this setting?

Your self-hosted runner is running inside a nixos-container, correct?

Yes

[sandydoo]

What's this setting?

It disables the daemon+post-build-hook push method.

- uses: cachix/cachix-action@v14
  with:
    useDaemon: false

I've been chipping away at setting up a similar runner in a nixos-container. I think what's happening is that the post-build-hook is being executed outside of the container by the Nix daemon, but the post-build-hook script the action creates is inside the container. That's why you're seeing the "no such file" error. I'm not sure what to do about this.

[sandydoo]

Basic repro:

1. Create /etc/script.sh on the server (not in the container):

#!/bin/sh
echo "oh hi there"

chmod +x /etc/script.sh

2. In a GitHub actions workflow:

run: |
  NIX_CONFIG="post-build-hook = /etc/script.sh" nix build --rebuild nixpkgs#hello

[domenkozar]

Sounds like another use case for build hook to run on the client side.