Basically it means that the necessary file (libs/libasound.so.2.0.0) does not exist on your system (and so cannot be copied to /usr/lib, as the install is trying to do).
CVS is inherently unstable as people patch and upgrade things; I would physically look in /usr/src/alsacvs/alsa-lib/src/libs and see if the file is there in the first place, then I would check and see if it's somewhere in the tree, but just not where the install is looking for it, then I would check and see if it was in the CVS tree at all (you can look through many CVS trees on the Web), and then I would check the homepage you're starting from (why is it not http://www.alsa-project.org
, the official ALSA site?) and see if there are any dependencies that need to be installed beforehand that you may have missed.
Or I would decide to skip all that and see if the most recent official ALSA packages for my distribution actually supported the card.
Hope this helps.