Moreover I have imported the following netlist into the magic.

** sch_path: /foss/designs/xschem/nmo_fingers_net.sch
**.subckt nmo_fingers_net
XM1 vdd vgg vss vss sky130_fd_pr__nfet_01v8_lvt L=0.5 W=10 nf=1 ad='int((nf+1)/2) * W/nf * 0.29' as='int((nf+2)/2) * W/nf * 0.29'
+ pd='2*int((nf+1)/2) * (W/nf + 0.29)' ps='2*int((nf+2)/2) * (W/nf + 0.29)' nrd='0.29 / W' nrs='0.29 / W'
+ sa=0 sb=0 sd=0 mult=1 m=1
**.ends
.end