these 2 derivations will be built:
  /nix/store/fc7mxw73vji1sidxk3n2c1vwdgmpafpm-closure-info.drv
  /nix/store/zzvplxvq6zybi829rjf1ndfy7n0mjldl-check-vars.drv
warning: SQLite database '/nix/var/nix/db/db.sqlite' is busy