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-ssh
derivation: /nix/store/xb5y46bhv6x8xvk034p7rhn7hri6q5fr-container-test-run-konf-ssh.drv
required (system, features): (aarch64-linux, ["nixos-test", "uid-range"])

connected builders:
  - eu: native=x86_64-linux systems=["x86_64-linux", "aarch64-linux", "i686-linux", "x86_64-windows"] features=["benchmark", "big-parallel", "kvm", "nixos-test", "uid-range"] max_jobs=4 state=Active
  - framejonge: native=x86_64-linux systems=["x86_64-linux", "aarch64-linux", "i686-linux"] features=["amd-gpu", "benchmark", "big-parallel", "cuda", "devnet", "gpu", "kvm", "nixos-test", "opengl", "uid-range"] max_jobs=24 state=Active
  - stack4ops: native=aarch64-linux systems=["aarch64-linux"] features=["benchmark", "big-parallel"] max_jobs=4 state=Active
  - us: native=x86_64-linux systems=["x86_64-linux", "aarch64-linux", "i686-linux", "x86_64-windows"] features=["benchmark", "big-parallel", "kvm", "nixos-test", "uid-range"] max_jobs=4 state=Active

["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.