Can no longer run on Mac Apple Silicon

```
> nix run github:Gabriella439/macos-builder
do you want to allow configuration setting 'extra-substituters' to be set to 'https://macos-builder.cachix.org' (y/N)? y
do you want to permanently mark this value as trusted (y/N)? N
do you want to allow configuration setting 'extra-trusted-public-keys' to be set to 'macos-builder.cachix.org-1:HPWcq59/iyqQz6HEtlO/kjD/a7ril0+/XJc+SZ2LgpI=' (y/N)? y
do you want to permanently mark this value as trusted (y/N)? N
warning: ignoring untrusted substituter 'https://macos-builder.cachix.org', you are not a trusted user.
Run `man nix.conf` for more information on the `substituters` configuration option.
error: a 'aarch64-linux' with features {} is required to build '/nix/store/xnpinlvbpnw9br16nsv8h7dqc19lz5ap-audit-disable.drv', but I am a 'aarch64-darwin' with features {apple-virt, benchmark, big-parallel, nixos-test}
```

Something changed and now I can no longer run the VM on apple silicon.
I was going through your repo (thank you!) to learn what you.

Start by reproducing the failure with `nix run github:Gabriella439/macos-builder` on Apple Silicon and compare the requested `aarch64-linux` target with the local `aarch64-darwin` system. Trace the VM build configuration and its trust or substituter setup; done means the reported VM command runs successfully on Apple Silicon.

Written by the indexing model from the issue text.