this derivation will be built:
  /nix/store/p62m3fr76s41dyixc4z90njaysqrlk9q-bernstein-3.14.159.drv
this path will be fetched (538.6 KiB download, 3.0 MiB unpacked):
  /nix/store/8kbgnls342clji25d2cy6pv05r109scx-python3.14-mcp-1.29.0