Fix up osx build logic
Fix up osx build logic

omnia-md/conda-recipes,cwehmeyer/conda-recipes,swails/conda-recipes,swails/conda-recipes,cwehmeyer/conda-recipes,swails/conda-recipes,cwehmeyer/conda-recipes,peastman/conda-recipes,omnia-md/conda-recipes,jchodera/conda-recipes,peastman/conda-recipes,omnia-md/conda-recipes,swails/conda-recipes,jchodera/conda-recipes,jchodera/conda-recipes,peastman/conda-recipes,cwehmeyer/conda-recipes,jchodera/conda-recipes