You can install dev releases with cpanm pretty easily...

cpanm Exception::Lite
! Finding Exception::Lite on cpanmetadb failed.
! Finding Exception::Lite () on mirror http://www.cpan.org failed.
! Couldn't find module or a distribution Exception::Lite ()

cpanm Exception::Lite --dev
--> Working on Exception::Lite
Fetching http://www.cpan.org/authors/id/E/EL/ELISHEVA/Exception-Lite-0
+.999_003.tar.gz ... OK
Configuring Exception-Lite-0.999_003 ... OK
Building and testing Exception-Lite-0.999_003 ... FAIL
! Installing Exception::Lite failed. See /home/moo/.cpanm/work/1377100
+570.9392/build.log for details. Retry with --force to force install i
+t.
[download]

...when they are installable anyway. Seems to be a problem (for me at least) 'Missing argument in testWarningsAndExceptions::A->new at /home/moo/.cpanm/work/1377100661.9618/Exception-Lite-0.999_003/blib/lib/Exception/Lite.pm line 482