this derivation will be built:
  /nix/store/q8g7lx0fi9fgxps5nhw30wry37h06kaq-bernstein-3.15.1.drv
this path will be fetched (538.7 KiB download, 3.0 MiB unpacked):
  /nix/store/j8bpk6nrh1287j0ns7gmbp0bc7hqdi4x-python3.14-mcp-1.29.0