@User: I just pushed an update to open_pdks to add support for the

sky130_fd_pr__nfet_03v3_nvt

device. The master branch of the repository on opencircuitdesign.com has been updated. As mentioned above, the layer name "nnfet" now refers to the 3.3V device while "mvnnfet" refers to the 5.0V device (although they are, in principle, both medium-voltage devices).