@User: "ext2spice scale on" is default and produces that .option line in the output, which is incompatible with the SkyWater PDK. Always use "ext2spice lvs" before running "ext2spice" to set reasonable options; "ext2spice lvs" is a shorthand for setting a number of important options, including "ext2spice format ngspice", "ext2spice hierarchy on", "ext2spice subcircuit top auto", "ext2spice scale off", and a few other less important ones.