conda + py314: libmamba Could not solve for environment specs

[pllim]

I really want to a grab a C program from conda-forge for this test. The Python version should not have mattered and yet it is not working. Is this a bug in OpenAstronomy workflow? Am I missing something?

tox.ini

[tox]
env_list =
    py{311,312,313,314}
isolated_build = True

[testenv]
description =
    run tests
extras = tests
conda_deps =
    hstcal
conda_channels =
    conda-forge
commands_pre =
    pip freeze
commands =
    pytest -v {posargs}

GitHub job:

jobs:
  test:
    uses: OpenAstronomy/github-actions-workflows/.github/workflows/tox.yml@9f1fedda61294df4c004c05519a3fbf3b8e1f32f  # v2.3.1
    with:
      conda: true
      envs: |
        - linux: py314

The error:

  error    libmamba Could not solve for environment specs
      The following packages are incompatible
      ├─ conda =* * is installable with the potential options
      │  ├─ conda [4.1.11|4.1.12|...|4.8.2] would require
      │  │  └─ python_abi =* *_cp27mu, which can be installed;
      │  ├─ conda [22.11.1|22.9.0|...|4.14.0] would require
      │  │  └─ python >=3.10,<3.11.0a0 *, which can be installed;
      │  ├─ conda [22.11.1|22.9.0|...|25.9.1] would require
      │  │  └─ python >=3.11,<3.12.0a0 *, which can be installed;
      │  ├─ conda [22.11.1|22.9.0|...|4.14.0] would require
      │  │  └─ python_abi ==3.8 *_pypy38_pp73, which requires
      │  │     └─ python =3.8 *_73_pypy, which can be installed;
      │  ├─ conda [22.11.1|22.9.0|...|4.9.2] would require
      │  │  └─ python >=3.8,<3.9.0a0 *, which can be installed;
      │  ├─ conda [22.11.1|22.9.0|...|4.14.0] would require
      │  │  └─ python_abi ==3.9 *_pypy39_pp73, which requires
      │  │     └─ python =3.9 *_73_pypy, which can be installed;
      │  ├─ conda [22.11.1|22.9.0|...|4.9.2] would require
      │  │  └─ python >=3.9,<3.10.0a0 *, which can be installed;
      │  ├─ conda [23.10.0|23.11.0|...|25.9.1] would require
      │  │  └─ python_abi =3.12 *_cp312, which requires
      │  │     └─ python =3.12 *_cpython, which can be installed;
      │  ├─ conda [25.1.1|25.11.0|...|25.9.1] would require
      │  │  └─ python_abi =3.13 *_cp313 with the potential options
      │  │     ├─ python_abi 3.13 would require
      │  │     │  └─ python =3.13 *_cpython, which can be installed;
      │  │     └─ python_abi 3.13 would require
      │  │        └─ python =3.13 *_cp313, which can be installed;
      │  ├─ conda [22.9.0|4.10.0|...|4.9.2] would require
      │  │  └─ python >=3.7,<3.8.0a0 *, which can be installed;
      │  ├─ conda [4.1.11|4.1.12|4.2.13] would require
      │  │  └─ python_abi =* *_cp34m, which can be installed;
      │  ├─ conda [4.1.11|4.1.12|...|4.5.9] would require
      │  │  └─ python_abi =* *_cp35m, which can be installed;
      │  ├─ conda [4.10.0|4.10.1|...|4.9.2] would require
      │  │  └─ python >=3.6,<3.7.0a0 * with the potential options
      │  │     ├─ python [3.6.0|3.6.1|...|3.6.9], which can be installed;
      │  │     └─ python 3.6.12 would require
      │  │        └─ pypy3.6 =7.3.3 *, which requires
      │  │           └─ python =3.6 *_73_pypy, which can be installed;
      │  ├─ conda [4.10.0|4.10.1|...|4.9.2] would require
      │  │  ├─ pypy3.6 >=7.3.3 *, which can be installed (as previously explained);
      │  │  └─ python_abi ==3.6 *_pypy36_pp73, which requires
      │  │     └─ python =3.6 *_73_pypy, which can be installed;
      │  ├─ conda [4.10.1|4.10.2|...|4.13.0] would require
      │  │  └─ python_abi ==3.7 *_pypy37_pp73, which requires
      │  │     └─ python =3.7 *_73_pypy, which can be installed;
      │  ├─ conda [4.2.13|4.3.21|...|4.8.2] would require
      │  │  └─ python_abi =* *_cp36m, which can be installed;
      │  ├─ conda [4.5.11|4.5.12|...|4.8.2] would require
      │  │  └─ python_abi =* *_cp37m, which can be installed;
      │  ├─ conda [4.7.12|4.8.0|4.8.2] would require
      │  │  └─ python_abi =* *_cp38, which can be installed;
      │  └─ conda 4.8.3 would require
      │     └─ python >=2.7,<2.8.0a0 *, which can be installed;
      └─ python =3.14 * is not installable because there are no viable options
         ├─ python [3.14.0|3.14.1|3.14.2] would require
         │  └─ python_abi =3.14 *_cp314, which conflicts with any installable versions previously reported;
         ├─ python [3.14.0|3.14.1|3.14.2] would require
         │  └─ python_abi =3.14 *_cp314t, which conflicts with any installable versions previously reported;
         └─ python [3.14.0rc1|3.14.0rc2|3.14.0rc3] would require
            └─ _python_rc =* *, which does not exist (perhaps a missing channel).
  critical libmamba Could not solve for environment specs
  Error: The process '/home/runner/micromamba-bin/micromamba' failed with exit code 1

Also see:

• TST: Test more Python versions spacetelescope/wfc3tools#103
• https://github.com/spacetelescope/wfc3tools/actions/runs/20174361247/job/57918765647?pr=103