We have a problem with conda-forge pypy build (conda-forge/phono3py-feedstock#9). The version 1.20.0 depends on phonopy 2.7 (<2.8). There is only 2.8.1 for pypy.
How strong is this dependence? Meybe we can broaden it to include higher versions or maybe release a new version synced with new phonopy? Otherwise I will abandon the pypy build for now.