Can someone point me in the right direction about the SKY130B PDK? I used to follow the instructions in http://opencircuitdesign.com/open_pdks/index.html, but it only mentions sky130A.

--with-sky130-variants= *all*|*A*|*B*

Thank you for your answer, I am using a finished docker image built by someone else and I just needed to update it to build the sky130b libs. I am still working on it...