1. downloaded threads-1.77.tar.gz 2. untared into /ssy/nos/threads_lib 3. cd /ssy/nos/threads_lib/threads-177 4. perl Makefile.PL PREFIX=/ssy/nos/threads_libs/lib 5. make 6. make test 7. make install 8. perl -Mthreads -e 'use lib "/ssy/nos/thread_libs/lib/";die $threads::VERSION' I get: 1.07 at -e line 1.