this derivation will be built:
  /nix/store/mkp5a4rhghcqngv26d6dadmaa0fas743-ouroboros.drv
this path will be fetched (20.8 MiB download, 64.5 MiB unpacked):
  /nix/store/qzb4y1b7qf1r9gbs5ygis52vaj8qd9xx-uv-0.12.16