Platform Specific Optional-Depencies in a Pyproject.toml?

[TheSkyentist]

Hello! I am trying to create a configuration using a pyproject.toml file to build a Python package with optional dependencies. Very basically, I want to have an optional dependency for jax-metal on macOS:

[project]
name = "test"
requires-python = ">= 3.13"
version = "0.1.0"
dependencies = ["jax>=0.4.38,<0.7"]

[tool.pixi.workspace]
channels = ["conda-forge"]
platforms = ["osx-arm64", "linux-64", "osx-64"]

[tool.pixi.environments]
default = {features = [], solve-group = "default"}
metal = {features = ["metal"], solve-group = "metal"}

[tool.pixi.feature.metal.target.osx-arm64.pypi-dependencies]
jax-metal = ">=0.1.1,<0.2"
jaxlib = "<0.5"

However adding the lines to expose this as a pypi-option fails as pixi attempts to solve the dependency for all platforms, which fails as metal is not available on non osx-arm64 platforms.

[project.optional-dependencies]
metal = ["jax-metal>=0.1.1,<0.2", "jaxlib<0.5"]

Is it possible to get pixi to only register the pyproject.toml optional dependencies for the desired platform?
Thanks in advance!