Installation of linux-builder fails with build error

[max-pfeiffer]

I was trying to install linux-builder on a vanilla nix-darwin installation. I ran darwin-rebuild with config:

nix.linux-builder = {
        enable = true;
  };

Which resulted in this error:
error: a 'x86_64-linux' with features {} is required to build '/nix/store/apfag2zyidha87zcvk4z1kjba7zaww5b-append-initrd-secrets.drv', but I am a 'x86_64-darwin' with features {apple-virt, benchmark, big-parallel, nixos-test}

Is this a bug? Or am I doing something wrong here?

[winterqt]

What Nixpkgs revision are you using?

[max-pfeiffer]

Checking the channels:
$:~/ > nix-channel --list
darwin https://github.com/LnL7/nix-darwin/archive/master.tar.gz

$:~/ > sudo -i nix-channel --list
nixpkgs https://nixos.org/channels/nixpkgs-unstable

[jamesla]

I have also started getting this (same nixpkg revisions). Did you manage to solve it?

[winterqt]

@max-pfeiffer @jamesla Assuming you both use channels, please run nix-instantiate --eval '<nixpkgs>' -A lib.trivial.version.

If not, please give me the Nixpkgs revision you're using.

[sandydoo]

Try enabling always-allow-substitutes = true in your nix.conf. This will allow Nix to substitute these derivations from the cache, instead of being forced to to build them by derivation overrides, like preferLocalBuild or allowSubstitutes.