these 2 derivations will be built:
  /nix/store/186byaald8ca8xxs12wn67yf3w50dw7q-harmonia-deps-3.2.0.drv
  /nix/store/cf3nkrgcxd2i2apslgf6fcsdlhkqf4s3-harmonia-llvm-cov-3.2.0.drv