Hi @StoneT2000 thanks for checking in, no it's not. After downgradity to python 3.10 everything worked (w/ mani_skill 3.0.0b10 and sapien 3.0.0b1), so I haven't changed my env. If you want me to ...

I'm trying to install re2c on Mac OS El Capitan but it does not work (see the error below). It is to be noted that I have python 3.9.7 installed. ($python --version ...