Hi, I'm trying change my lib from

.lib D:/Spice_general/open_pdks/sky130/sky130A/libs.tech/combined/sky130.lib.spice tt

to

.lib D:/Spice_general/open_pdks/sky130/sky130A/libs.tech/ngspice/sky130.lib.spice tt

Does anyone know the appropriate env var for this?

In the

xschemrc

the variable used is

SKYWATER_MODELS

# set SKYWATER_MODELS ${PDK_ROOT}/${PDK}/libs.tech/ngspice
  set SKYWATER_MODELS ${PDK_ROOT}/${PDK}/libs.tech/combined

I have the two lines above in my xschemrc so I can comment/uncomment to switch. You can change this setting runtime by copy / pasting one of the above lines (uncommented) in the xschem console. and re-generating the netlist.