these 2 derivations will be built:
  /nix/store/rvj4z2jbkp2g8n0k5icsg9p1fm9s9571-generated-docs.drv
  /nix/store/ahkb1rr4a4pcylaw6cangsw3fcr9f5zr-nix-shell.drv
warning: SQLite database '/nix/var/nix/db/db.sqlite' is busy
warning: SQLite database '/nix/var/nix/db/db.sqlite' is busy