argunix pre-flight: no connected builder satisfies this derivation's
requiredSystemFeatures. Failing fast instead of waiting for nix's
remote-build scheduler to give up.

attribute: checks.aarch64-linux.konf-7-15
derivation: /nix/store/mqldabk1g5fqk8njn2wvj7d8gbllwx94-container-test-run-konf-7-15.drv
required (system, features): (aarch64-linux, ["nixos-test", "uid-range"])

connected builders: (none)

["nixos-test"] only count on a builder whose native system is aarch64-linux:
a builder that runs aarch64-linux under binfmt emulation cannot run a
aarch64-linux VM with KVM, even if it advertises `kvm` for its own system.

Fix one of:
  1. Add the missing feature(s) to a builder's nix.settings.system-features.
  2. Add a builder host that natively satisfies the feature.
  3. Drop the requirement from the derivation if it isn't actually needed.