this derivation will be built:
  /nix/store/rbaags3i4vk1s201hb9n8vyb59vkykn1-release-rehearsal.drv
this path will be fetched (0.0 KiB download, 2.5 KiB unpacked):
  /nix/store/b6zy1dcnrgq3hyk4fd70zg64j6amqlhz-github-api-stub.py