these 4 derivations will be built:
  /nix/store/9rh18ddvx2wff3fmnfk87gbc1cwr7gm3-harmonia-llvm-cov-3.3.0.drv
  /nix/store/iv9c23y53r4f0dbnbzhbih7g8ahb2a9v-harmonia-llvm-cov-3.3.0.drv
  /nix/store/zpnvd7yxsd5lbymw274hi4zych94xpzm-harmonia-llvm-cov-3.3.0.drv
  /nix/store/bywpan2zlkj58d44cgbz34bmih2y6cq9-inputDerivation-upload-codecov-effect.drv
building '/nix/store/9rh18ddvx2wff3fmnfk87gbc1cwr7gm3-harmonia-llvm-cov-3.3.0.drv'...
building '/nix/store/iv9c23y53r4f0dbnbzhbih7g8ahb2a9v-harmonia-llvm-cov-3.3.0.drv'...
building '/nix/store/zpnvd7yxsd5lbymw274hi4zych94xpzm-harmonia-llvm-cov-3.3.0.drv'...
building '/nix/store/bywpan2zlkj58d44cgbz34bmih2y6cq9-inputDerivation-upload-codecov-effect.drv'...