I haven't tried this, but you could perhaps use oil instead of ghee. Your namakpare will not have the unique flavour and taste that ghee adds to them though.

Put all the ingredients, except the water, in the food processor bowl and blend. Then add the water, a little at a time, to make a dough that is more on the stiff side yet elastic. You do not want the dough to use more water than necessary or your namkpare/ crackers will not become crisp on baking. You can do this by hand too.

Cover the dough and let it rest for about half an hour. Divide the dough into 2 or 3 portions (depending on what is easier for you). Roll out each portion into as thin a circle as possible (should be about 1/8" thick or less). Using a pizza cutter or sharp knife, cut the circle into small diamond shaped pieces or about 12 triangles (like pizza wedges).

Dock the pieces/ triangles using a fork so that airpockets don't form during baking.

Place them on lightly greased sheets and bake at 200C (400F) for about 15 to 20 minutes till light brown and done. Cool on a rack and store in an airtight container.