these 3 derivations will be built:
  /nix/store/zf70by64lfhvdavsn6grza06hnypalqw-docker-image-sources.drv
  /nix/store/7zba85i2r5c612cf2b84x4ihym7c4kzz-docker-image-inputs.drv
  /nix/store/17msijnhsqxg27z09qisv8d3yl8v8r3f-docker-image-inputs-hash.drv
warning: SQLite database '/nix/var/nix/db/db.sqlite' is busy