this derivation will be built:
  /nix/store/ga7qxfhlbcv891xc06dqa4x8j03k0v0i-ouroboros.drv
this path will be fetched (17.4 MiB download, 49.7 MiB unpacked):
  /nix/store/lgrjxh2j5dqvdifh2lhrj2w0c0g5i1jg-uv-0.13.4
building '/nix/store/ga7qxfhlbcv891xc06dqa4x8j03k0v0i-ouroboros.drv'
ouroboros> structuredAttrs is enabled

upload niks3: ok