The issue is that $DIR_PATH is not defined. velvethammer2 , I assume you were following the instructions on the DM support web site? I think that the $DIR_PATH in those instructions are a typo.

CruzCoins' instructions on this thread are correct though.

Also, you could consider dropping the –prefix option altogether if you want to install the cgminer in the default location (which is what I did; you can see my post on the subject if you're interested).

HTH...