these 3 derivations will be built:
  /nix/store/j1ybp7b3z68ssin94ri97chm9wbj7zfa-ccusage-20.0.30-vendor.drv
  /nix/store/p2qf2q485vxkvvr26si4jfj63lay46pc-ccusage-20.0.30.drv
  /nix/store/j5jpgyc0lsa7sycxf3sw4grdfjfv01m8-check-ccusage.drv
warning: SQLite database '/nix/var/nix/db/db.sqlite' is busy