At the end of the make install process, the Makefile tries to run "if test -e" with the sh shell. The solaris 10 test man page reports "-e file True if file exists. (Not available in sh.)" Which causes part of the install process to fail.
Workarounds include changing /bin/sh in the Makefile to /bin/bash or replacing the test -e with test -r
Thanks for reporting!
Fix using test -r pushed to master, v3-3-test and v3-2-test.