these 2 derivations will be built:
  /nix/store/mxsy34ihiyhgk5khnw9dm65c104lvjfw-harmonia-deps-3.2.0.drv
  /nix/store/dq5hlbik2pc7arb98hgf97mvpqwcdq6c-harmonia-llvm-cov-3.2.0.drv

post-build step Upload coverage to codecov: ok
/nix/store/v0fkg12ls466mc7hdamwqp71ypwm8sqb-codecov-upload: line 5: find: command not found
No coverage JSON found in /nix/store/qj92gm729pidgvnpjd75fhgda08jja0p-harmonia-llvm-cov-3.2.0