In reply to @hexa:lossy.network
for whatever reason there is an actual test failure on aarch64-linux

Results (10.48s):
     566 passed
       1 failed
         - tests/test_completion/test_completion.py:24 test_install_completion

――――――――――――――――――――――――――― test_install_completion ――――――――――――――――――――――――――――
[gw37] linux -- Python 3.10.5 /nix/store/c4xfjyf5s9ap9f73psq74ffxqpcqssqy-python3-3.10.5/bin/python3.10
def test_install_completion():
        bash_completion_path: Path = Path.home() / ".bashrc"
        text = ""
        if bash_completion_path.is_file():  # pragma: nocover
            text = bash_completion_path.read_text()
        result = subprocess.run(
            [
                "bash",
                "-c",
                f"{sys.executable} -m coverage run {mod.__file__} --install-completion",
            ],
            stdout=subprocess.PIPE,
            stderr=subprocess.PIPE,
            encoding="utf-8",
            env={**os.environ, "SHELL": "/bin/bash", "_TYPER_COMPLETE_TESTING": "True"},
        )
        new_text = bash_completion_path.read_text()
        bash_completion_path.write_text(text)
>       assert "source" in new_text
E       AssertionError: assert 'source' in ''

tests/test_completion/test_completion.py:42: AssertionError

weird, trying for force a rebuild is ignoring my remote builder

❯ NIXPKGS_ALLOW_BROKEN=1 nix build --rebuild --impure .#legacyPackages.aarch64-linux.python3Packages.typer
error: a 'aarch64-linux' with features {} is required to build '/nix/store/c24dg8lriwd7z6546vw9pq1ikgdiclrk-python3.10-typer-0.6.1.drv', but I am a 'aarch64-darwin' with features {benchmark, big-parallel, nixos-test}
~/.c/nix-darwin [ main][%✓][ impure]
❯ echo $NIX_CONFIG
builders = ssh-ng://dockerbuilder aarch64-linux /etc/nix/nix_builder_ed25519 5 1 benchmark - -

Results (10.04s):
     565 passed

Results (130.69s):
     567 passed

Ok so it passes on NixOS on my rpi as well