mlpstorage error with proxy, needs httpx[socks]

After successfully installing uv, when running the mlpstorage --help command, I get an error installing rust due to the lack of the socksio library.

I tried both uv add socksio and uv add "httpx[socks]", but these commands fail with the same error:

  × Failed to build `dgen-py==0.2.2`
  ├─▶ The build backend returned an error
  ╰─▶ Call to `maturin.build_wheel` failed (exit status: 1)

      [stdout]
      Rust not found, installing into a temporary directory

      [stderr]
      Python reports SOABI: cpython-312-x86_64-linux-gnu
      Computed rustc target triple: x86_64-unknown-linux-gnu
      Installation directory: /home/dslik/.cache/puccinialin
      Downloading rustup-init from https://static.rust-lang.org/rustup/dist/x86_64-unknown-linux-gnu/rustup-init
      Traceback (most recent call last):
        File "<string>", line 11, in <module>
        File "/home/dslik/.cache/uv/builds-v0/.tmpw57uzG/lib/python3.12/site-packages/maturin/__init__.py", line 138, in
      build_wheel
          return _build_wheel(wheel_directory, config_settings, metadata_directory)
                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
        File "/home/dslik/.cache/uv/builds-v0/.tmpw57uzG/lib/python3.12/site-packages/maturin/__init__.py", line 111, in
      _build_wheel
          env = _get_env()
                ^^^^^^^^^^
        File "/home/dslik/.cache/uv/builds-v0/.tmpw57uzG/lib/python3.12/site-packages/maturin/__init__.py", line 75, in _get_env
          extra_env = setup_rust()
                      ^^^^^^^^^^^^
        File "/home/dslik/.cache/uv/builds-v0/.tmpw57uzG/lib/python3.12/site-packages/puccinialin/_setup_rust.py", line 124, in
      setup_rust
          rustup_init = download_rustup(url, rustup_init, target, file)
                        ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
        File "/home/dslik/.cache/uv/builds-v0/.tmpw57uzG/lib/python3.12/site-packages/puccinialin/_setup_rust.py", line 33, in
      download_rustup
          client = httpx.Client(timeout=60)
                   ^^^^^^^^^^^^^^^^^^^^^^^^
        File "/home/dslik/.cache/uv/builds-v0/.tmpw57uzG/lib/python3.12/site-packages/httpx/_client.py", line 700, in __init__
          else self._init_proxy_transport(
               ^^^^^^^^^^^^^^^^^^^^^^^^^^^
        File "/home/dslik/.cache/uv/builds-v0/.tmpw57uzG/lib/python3.12/site-packages/httpx/_client.py", line 750, in
      _init_proxy_transport
          return HTTPTransport(
                 ^^^^^^^^^^^^^^
        File "/home/dslik/.cache/uv/builds-v0/.tmpw57uzG/lib/python3.12/site-packages/httpx/_transports/default.py", line 191,
      in __init__
          raise ImportError(
      ImportError: Using SOCKS proxy, but the 'socksio' package is not installed. Make sure to install httpx using `pip install
      httpx[socks]`.

      hint: This usually indicates a problem with the package or the build environment.
  help: `dgen-py` (v0.2.2) was included because `mlpstorage` (v2.0.0b1) depends on `dlio-benchmark` (v3.0.0) which depends on
        `dgen-py`

I added httpx[socks] to pyproject.toml and re-ran uv lock to try to add it to the uv environment:

Resolved 104 packages in 3.87s
Added anyio v4.13.0
Added h11 v0.16.0
Added httpcore v1.0.9
Added httpx v0.28.1
Added socksio v1.0.0

However, when I try to run mlpstorage, I still get the same error. I tried manually changing the order of the dependencies in the uv.lock file, no luck with that either.

Is there something specific that I need to do to get these newly added dependencies to persist?

Start with pyproject.toml and uv.lock, then reproduce the failure by running mlpstorage --help in a clean environment. Trace how the build-isolated dgen-py dependency obtains httpx and socksio; done means the command no longer fails with the missing socksio error without manual lockfile edits.