Latest cupy cannot be installed with `cuda-version<12.4"

[leofang]

Solution to issue cannot be found in the documentation.

• I checked the documentation.

Issue

I expect after #267 I can use the latest cupy (built with CUDA 12.4) + any CUDA 12.x, but the env is not solvable:

$ conda create -n bbnn python=3.11 "cupy=13.1.*=*_3" cuda-version=12.3
Channels:
 - conda-forge
Platform: linux-64
Collecting package metadata (repodata.json): done
Solving environment: failed

LibMambaUnsatisfiableError: Encountered problems while solving:
  - package cupy-13.1.0-py39h051b840_3 requires libcusparse, but none of the providers can be installed

Could not solve for environment specs
The following packages are incompatible
├─ cuda-version 12.3**  is requested and can be installed;
└─ cupy 13.1* *_3 is not installable because there are no viable options
   ├─ cupy 13.1.0 would require
   │  ├─ cupy-core [13.1.0 py310h7958d60_3|13.1.0 py311he1e6e68_3|13.1.0 py312hffdfcc6_3|13.1.0 py39hc25c46e_3], which requires
   │  │  └─ libcusparse >=12.3.1.170,<13.0a0 , which can be installed;
   │  └─ libcusparse but there are no viable options
   │     ├─ libcusparse 12.0.0.76 would require
   │     │  └─ cuda-version [>=12.0,<12.1.0a0 |>=12.0.0,<12.1.0a0 ], which conflicts with any installable versions previously reported;
   │     ├─ libcusparse 12.1.0.106 would require
   │     │  └─ cuda-version >=12.1,<12.2.0a0 , which conflicts with any installable versions previously reported;
   │     ├─ libcusparse 12.1.2.141 would require
   │     │  └─ cuda-version >=12.2,<12.3.0a0 , which conflicts with any installable versions previously reported;
   │     ├─ libcusparse 12.2.0.103 conflicts with any installable versions previously reported;
   │     └─ libcusparse [12.3.0.142|12.3.1.170] would require
   │        └─ cuda-version >=12.4,<12.5.0a0 , which conflicts with any installable versions previously reported;
   └─ cupy 13.1.0 would require
      └─ cuda-version >=11.0,<12.0a0 , which conflicts with any installable versions previously reported.

The problem is we pinned the optional dependencies too tight:

cupy-feedstock/recipe/meta.yaml

Lines 200 to 205 in 93627ff

	- {{ pin_compatible('cuda-nvrtc', max_pin='x') }} # [(cuda_compiler_version or "").startswith("12")]
	- {{ pin_compatible('libcublas', max_pin='x') }} # [(cuda_compiler_version or "").startswith("12")]
	- {{ pin_compatible('libcufft', max_pin='x') }} # [(cuda_compiler_version or "").startswith("12")]
	- {{ pin_compatible('libcurand', max_pin='x') }} # [(cuda_compiler_version or "").startswith("12")]
	- {{ pin_compatible('libcusolver', max_pin='x') }} # [(cuda_compiler_version or "").startswith("12")]
	- {{ pin_compatible('libcusparse', max_pin='x') }} # [(cuda_compiler_version or "").startswith("12")]

We should either

1. relax the min_pin, or
2. just don't pin, let the version float, and rely on cuda-version to get a consistent env

Installed packages

n/a

Environment info

n/a

[leofang]

@conda-forge-admin, please rerender

[conda-forge-webservices]

Hi! This is the friendly automated conda-forge-webservice.

I just wanted to let you know that I started rerendering the recipe in #269.