these 2 derivations will be built:
  /nix/store/kiy9lr34zwx3h47qgbp8hd2m6d5nl8dr-formatter.drv
  /nix/store/jj77bz13mczsszkag3d20srgif708g1l-check-formatting.drv
these 3 paths will be fetched (1.5 MiB download, 8.4 MiB unpacked):
  /nix/store/0qakfy0pyvma5sv880fvhyl7n34hfhln-fd-10.4.2
  /nix/store/973ryygmcrl55my2jbfvm92sqbxyg0il-jemalloc-5.3.1
  /nix/store/58wahpfp88r4girryh9b45m22l51lb0k-nixpkgs-fmt-1.3.0
warning: SQLite database '/nix/var/nix/db/db.sqlite' is busy