these 10 derivations will be built:
  /nix/store/4i1vcnjj0n90hcdml8csmkk96wl6vcmp-unit-tinc.mesh.service.drv
  /nix/store/gvlldb8spixg0j4zibchgiq1577yh1nv-unit-tinc-auth.service.drv
  /nix/store/xqgzgrcii7a2qbyz965id56xvxcyr3m9-system-units.drv
  /nix/store/3b2z0nx9j37hai2i9gdhnq7q0mvz0wq1-etc.drv
  /nix/store/bw403hmayqcnn6q5kir11dqkv1pdlkzf-activate.drv
  /nix/store/kpmzjm96h8pv71aa5n98drva3as8prd7-nixos-system-solo-test.drv
  /nix/store/219g0rshzinliz23l56ph139na2xgji5-run-solo-nspawn.drv
  /nix/store/rpgrharaap9i0yj07zck2ayy9qfrxvfn-driverConfiguration.json.drv
  /nix/store/lyzm06kzcd23h3dlzaq136g89034fmd7-nixos-test-driver-tinc-auth-authelia.drv
  /nix/store/ahv13sj266cr0vxj0zjxslqvgi9ib5g1-container-test-run-tinc-auth-authelia.drv
warning: SQLite database '/nix/var/nix/db/db.sqlite' is busy
Failed to find a machine for remote build!
derivation: ahv13sj266cr0vxj0zjxslqvgi9ib5g1-container-test-run-tinc-auth-authelia.drv
required (system, features): (aarch64-linux, [kvm, nixos-test, uid-range])
1 available machines:
(systems, maxjobs, supportedFeatures, mandatoryFeatures)
([aarch64-darwin, x86_64-darwin], 8, [big-parallel, recursive-nix], [])