Look at the picture in it versus in the link:
https://groupgets-files.s3.amazonaws.com/Efabless/open-sourc...
They are different. Also, if you go to https://vlsicad.ucsd.edu/Publications/Conferences/383/c383.p...
Figure 6: You can find the image from the link (top left), and the on ehtat you linked (bottom left), so they are two different projects.