these 4 derivations will be built:
  /nix/store/8y73k9wfzbwgbmrjwa0h8d7ph0hsxhva-harmonia-llvm-cov-3.3.0.drv
  /nix/store/fsm89xw1bgy3nyr0vzi0xgr04194dmaa-harmonia-llvm-cov-3.3.0.drv
  /nix/store/rpfkpzryx6xqyjp9j0z3hhz9wigjnz1n-harmonia-llvm-cov-3.3.0.drv
  /nix/store/b1rrwqv5n26pik29drszn2dw8b4vh790-inputDerivation-upload-codecov-effect.drv
building '/nix/store/8y73k9wfzbwgbmrjwa0h8d7ph0hsxhva-harmonia-llvm-cov-3.3.0.drv'...
building '/nix/store/fsm89xw1bgy3nyr0vzi0xgr04194dmaa-harmonia-llvm-cov-3.3.0.drv'...
building '/nix/store/rpfkpzryx6xqyjp9j0z3hhz9wigjnz1n-harmonia-llvm-cov-3.3.0.drv'...
building '/nix/store/b1rrwqv5n26pik29drszn2dw8b4vh790-inputDerivation-upload-codecov-effect.drv'...