these 2 derivations will be built:
  /nix/store/bxpl96ryw70k6r4scdina0bwi6sk3mw8-harmonia-deps-3.2.0.drv
  /nix/store/wcqnqlck433vcprisl2889zjwk3qzpd9-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/8fpxbx9sndy8n0zk23bxk3gl6d04kzp6-harmonia-llvm-cov-3.2.0