Yes, looks like a Nostromo.
Definitely.
Nice work! Especially because it is home-made.
And now go and add surface details... and then paint it
If out-of-the box usable papercraft templates are not available, looking for STL-Files and then unfolding them in pepakura could save work on projects like this.
In addition, later editing of the unfolded structure saved as SVG might make sense... but i assume Nostromo is uncomplicated enough.
"Uncomplicated" because Nostromo has almost no round or even organic shapes.