`nix-eval-jobs` compatibility

[andre4ik3]

Currently there is no "Determinate nix-eval-jobs", meaning anything that uses Determinate Nix-specific features (such as build-time flake inputs) will fail with nix-eval-jobs:

+ nix-eval-jobs --flake .#hydraJobs --force-recurse --no-instantiate --option allow-import-from-derivation false --show-trace --max-memory-size 1024 --workers 2
warning: unknown experimental feature 'build-time-fetch-tree'
warning: unknown setting 'bash-prompt-prefix'
warning: unknown setting 'eval-cores'
warning: unknown setting 'lazy-trees'
warning: unknown setting 'trusted-users'
warning: Git tree '/home/runner/work/dotfiles/dotfiles' is dirty
warning: Git tree '/home/runner/work/dotfiles/dotfiles' is dirty
error: unexpected flake input attribute 'buildTime', at /home/runner/work/dotfiles/dotfiles/flake.nix:281:5
error: unexpected flake input attribute 'buildTime', at /home/runner/work/dotfiles/dotfiles/flake.nix:281:5
error: worker error: error: unexpected flake input attribute 'buildTime', at /home/runner/work/dotfiles/dotfiles/flake.nix:281:5

It would be nice to have an overlay with a nix-eval-jobs that is built against Determinate Nix instead of upstream Nix, so that it handles this correctly, similar to how Lix does this.

I tried an overlay like this:

(final: prev: {
  nix-eval-jobs = prev.nix-eval-jobs.override {
    nixComponents = final.determinate-nix-components;
  };
})

(where determinate-nix-components is from DeterminateSystems/nix-src)

But it fails with compilation errors.

I'll try to use nix-eval-jobs as a flake similar to above, but I think it requires patches in either case.

[andre4ik3]

I just found the https://github.com/DeterminateSystems/nix-eval-jobs/tree/detsys branch which builds for Determinate Nix, and integrated it into my configuration successfully, just by adding it as a flake input and then using this overlay:

(final: prev: {
  determinate-nix-eval-jobs = let
    src = inputs.determinate-nix-eval-jobs.outPath;
  in final.callPackage "${src}/default.nix" {
    nixComponents = final.determinate-nix-components;
  };
})

However, I still think that as part of this module it should have an overlay to replace nix-eval-jobs so it doesn't break like this by default.