these 2 derivations will be built:
  /nix/store/zlxqgklx2yph37n2gk1i62gpf0zwm8cf-mmonit-4.3.3-linux-x64.tar.gz.drv
  /nix/store/38x5wdrg7bw8icwxg9lzagqm37wb6qvs-mmonit-4.3.3.drv
warning: SQLite database '/nix/var/nix/db/db.sqlite' is busy