mambabuild fails for OSX cross compilation

Issue: It seems that OSX cross compilation isn’t pulling in the right dependency.

This leads to rather strange errors: https://github.com/mamba-org/boa/issues/199

I suspect that it will happen for other cross compilations, but for now, I feel like it would help many people if at least for OSX, mambabuild was disabled.

https://github.com/conda-forge/pytorch-cpu-feedstock/pull/70

    mamba-0.17.0               |   py39hb671511_0         785 KB  conda-forge
    conda-build-3.21.4         |   py39h6e9494a_0         555 KB  conda-forge
    conda-env-2.6.0            |                1           2 KB  conda-forge
    conda-forge-ci-setup-3.15.0|   py39hb0a6171_0          41 KB  conda-forge

[wolfv]

One other fix that works here: https://github.com/conda-forge/libignition-rendering4-feedstock/pull/32/files#diff-d10439659fe44156d9eac347f9e9eb6992e5b516d0f7e86df061c8273397fd7dR62

Is to use export CONDA_OVERRIDE_OSX=11.0 (or the version required by MACOSX_DEPLOYMENT_TARGET).

I am looking for the place where conda-build is overriding these values but still can’t find it.

[hmaarrfk]

nixe find!