make_immutable is now deprecated, stop using it and a fix your old code please
lrwxrwxrwx Build.PL -> Makefile.PL
-rw-r--r-- Changes
-rw-r--r-- MANIFEST
-rw-r--r-- MANIFEST.SKIP
-rw-r--r-- Makefile.PL
-rw-r--r-- PLANS
-rw-r--r-- README
-rw-r--r-- TODO
drwxr-xr-x benchmarks
drwxr-xr-x lib
drwxr-xr-x t