Duplicate entries with platform constraints in requirements.txt regression

[keith]

If I have a requirements.in like this:

--extra-index-url https://download.pytorch.org/whl/cpu
torch==2.4.1; platform_machine != "x86_64"
torch==2.4.1+cpu; platform_machine == "x86_64"

Which I use to generate a universal requirements.txt with uv using: uv pip compile --universal requirements.in -o requirements_lock.txt --emit-index-url --no-strip-markers, I end up with multiple entries for torch in that lockfile:

SNIP
torch==2.4.1+cpu ; platform_machine == 'x86_64'
    # via -r requirements.in
torch==2.4.1 ; platform_machine != 'x86_64'
    # via -r requirements.in
SNIP

When I attempt to pull those in with:

pip = use_extension("@rules_python//python/extensions:pip.bzl", "pip")
pip.parse(
    hub_name = "pip",
    python_version = "3.11",
    requirements_lock = "//:requirements_lock.txt",
)
use_repo(pip, "pip")

and use them with:

load("@pip//:requirements.bzl", "requirement")

alias(
    name = "foo",
    actual = requirement("torch"),
)

It fails with:

ERROR: Traceback (most recent call last):
	File "/private/var/tmp/_bazel_ksmiley/edd497f7df052e6d5ffcf384da842af2/external/rules_python~~pip~pip/torch/BUILD.bazel", line 9, column 35, in <toplevel>
		"//_config:is_python_3.11": "pip_311_torch_linux_x86_64_osx_x86_64_windows_x86_64",
Error: dictionary expression has duplicate key: "//_config:is_python_3.11"
ERROR: /private/var/tmp/_bazel_ksmiley/edd497f7df052e6d5ffcf384da842af2/external/rules_python~~pip~pip/torch/BUILD.bazel: no such target '@@rules_python~~pip~pip//torch:pkg': target 'pkg' not declared in package 'torch' defined by /private/var/tmp/_bazel_ksmiley/edd497f7df052e6d5ffcf384da842af2/external/rules_python~~pip~pip/torch/BUILD.bazel
ERROR: /Users/ksmiley/Downloads/pyrepro/BUILD.bazel:3:6: no such target '@@rules_python~~pip~pip//torch:pkg': target 'pkg' not declared in package 'torch' defined by /private/var/tmp/_bazel_ksmiley/edd497f7df052e6d5ffcf384da842af2/external/rules_python~~pip~pip/torch/BUILD.bazel and referenced by '//:foo'
ERROR: Analysis of target '//:foo' failed; build aborted: Analysis failed

This setup temporarily worked after this landed #2377 but then regressed in 2abca35

🔬 Minimal Reproduction

Build in this project: pyrepro.zip

[aignas]

Thanks for the repro