The license entry in cmn.asd is incorrect -- I never noticed that Rick Taube specified GPL. The BSD or MIT licenses are ok. I wrote all of cmn; Rick was just helping by adding the asd file, and I paid no attention to it. We weren't so concerned with licenses in those days. (I'll update the ccrma tarball). cmn-all.lisp builds cmn fine for me -- is the problem the directory? Also to run it you need to be in the cmn package. Thanks for your interest in this software!