these 3 derivations will be built:
  /nix/store/iypvs22g3innh0iw7q8qd25cxrnn7x55-ck-0.8.1-vendor.drv
  /nix/store/15z69d6iaxqwmwr0q39hdvl5d1bjpidk-ck-0.8.1.drv
  /nix/store/g4k0mynisc6l0ldm0wsdwgd8xvwyk6wb-check-ck.drv
warning: SQLite database '/nix/var/nix/db/db.sqlite' is busy
warning: SQLite database '/nix/var/nix/db/db.sqlite' is busy