these 2 derivations will be built:
  /nix/store/m4mhz3g7qlgdjl51ll37vmx7napyz6c3-kandev-0.98.0.drv
  /nix/store/djzaayz87mwaak47h74rq54jjpbx2ygg-check-kandev.drv
warning: SQLite database '/nix/var/nix/db/db.sqlite' is busy