Comment:

This way, we can setup cross compiling env things like OPAL_PREFIX and build_env compiler.
Also, we can remove hacks like https://github.com/conda-forge/conda-smithy/blob/52db47bc3064f2471c1c8927c02d1149014557fa/conda_smithy/configure_feedstock.py#L280

cc @minrk, @beckermr