these 2 derivations will be built:
  /nix/store/fsfwqskwg7hghiixs8hl8m6ny425lflx-eca-0.165.0.drv
  /nix/store/n4jpzcbvbr0a8xlwcfrgzg8hy7a9cf8c-check-eca.drv
warning: SQLite database '/nix/var/nix/db/db.sqlite' is busy