Hi, So I am trying to run a simple simulation with skywater nfet_01v8 included. I keep getting an error that subckt used is unknown. Can anyone please help me with fixing this issue? I have attached the schematic, spice file and the code for your reference.

Maybe include the library?

I am using ngspice with xschem provided in efabless. If anyone could share the path that'll be great. I tried the .include and .lib with the paths of the symbol, didn't help.