these 2 derivations will be built:
  /nix/store/8dzq16vg5q3cx9441xjm59qykqv7zdwh-harmonia-deps-3.2.0.drv
  /nix/store/9c1vqrkijlddfn31k5v1n59s1xj0dg29-harmonia-llvm-cov-3.2.0.drv