these 3 derivations will be built:
  /nix/store/dv6v6vzqcy8lvds7bg5fp68na22jl4q4-iets-fuzz-diff-0.0.0.drv
  /nix/store/plblprwx1aln4bsihzg5j45idl8aj25k-iets-fuzzers-0.0.0.drv
  /nix/store/wh97bdfhqnza1wm9s0qgxy1lrhzpxm2c-iets-fuzz-nar-check.drv
warning: SQLite database '/nix/var/nix/db/db.sqlite' is busy