this derivation will be built: /nix/store/syg9ij8ih6cbc1x36mj0x9i28y9cyh3l-bernstein-3.14.159.drv this path will be fetched (538.7 KiB download, 3.0 MiB unpacked): /nix/store/afrbd65njhfskvysjj299pkzjrchv6lz-python3.14-mcp-1.29.0