this derivation will be built:
  /nix/store/wqs2q92p6n8wdlm63phwwp95bylihw0b-bernstein-3.15.1.drv
this path will be fetched (538.7 KiB download, 3.0 MiB unpacked):
  /nix/store/jcg2dp6wilwczq5pa17nm87wgx39z6by-python3.14-mcp-1.29.0