these 2 derivations will be built:
  /nix/store/f8w71z53i2la9wclcd6l4xg10vzw26g9-generate-dependency-diagram.drv
  /nix/store/4w00z2d1skan7606swr7camfy20pjgsf-check-dependency-diagram.drv
warning: SQLite database '/nix/var/nix/db/db.sqlite' is busy