Hi, I am trying to setup an x86_64-darwin laptop for a zero-hydra failure meetup tonight and I am running into:

nixer@Nixers-MBP nix-darwin % sudo nix run nix-darwin/master#darwin-rebuild -- switch
warning: $HOME ('/Users/nixer') is not owned by you, falling back to the one defined in the 'passwd' file ('/var/root')
building the system configuration...
error: a 'aarch64-darwin' with features {} is required to build '/nix/store/fpnqc8vj5inchshwwrb7whp9q0wjqvh7-builder.pl.drv', but I am a 'x86_64-darwin' with features {apple-virt, benchmark, big-parallel, nixos-test}

       Hint: the failing derivation has allowSubstitutes set to false, forcing it to be built rather than substituted.
       Passing --always-allow-substitutes to force substitution may resolve this failure if the path is available in a substituter.
nixer@Nixers-MBP nix-darwin % 

I am using the default flake.nix from the nix-darwin README and fwiw I set system = "x86_64-darwin"; in the darwinSystem call.

Is this a known issue?