rosmake cminpack problem

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System: OS X 10.6.6 diamondback

When trying to rosmake cminpack (as I try to install perception-pcl again) I get the following error:

mkdir -p build
 if [ ! -f cminpack-1.1.1.tar.gz.md5sum ]; then echo "Error: Couldn't find md5sum file cminpack-1.1.1.tar.gz.md5sum" && false; fi

There is a cminpack-1.1.1.tar.gz.md5sum file in /cminpack but that wasn't doing it. So I copied it to the build subdirectory and rosmake succeeded. Does that make sense? Here's what Makefile says:

VER = 1.1.1
TARBALL       = build/cminpack-$(VER).tar.gz
TARBALL_URL   = http://pr.willowgarage.com/downloads/cminpack-$(VER).tar.gz
UNPACK_CMD    = tar xfz
SOURCE_DIR    = build/cminpack-$(VER)
#TARBALL_PATCH = cminpack.pc.patch
MD5SUM_FILE   = cminpack-$(VER).tar.gz.md5sum