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commit d2b8bacff13dcb8224a95a5b140522d29e015594
Author: Tatsuhiko Miyagawa <>
Date:   Wed Aug 7 11:58:57 2013 -0700

    Add notes on differernt Perl versions
 lib/ | 18 ++++++++++++++++++
 1 file changed, 18 insertions(+)

diff --git a/lib/ b/lib/
index 7b274e5..65c8801 100644
--- a/lib/
+++ b/lib/
@@ -113,6 +113,24 @@ C<--deployment> option, you can avoid querying for a 
database like
 CPAN Meta DB or downloading files from CPAN mirrors upon deployment
+When you take a snapshot in one perl version and deploy on another
+(different) version, you might have troubles with core modules.
+The simples solution, which might not work for everybody, is to use
+the same version of perl in the development and deployment.
+To enforce that, you're recommended to use L<plenv> and
+C<.perl-version> to lock perl versions in development.
+You can also specify the minimum perl required in C<cpanfile>:
+  requires 'perl', '5.16.3';
+and carton (and cpanm) will give you errors when deployed on hosts
+with perl lower than the specified version.
 =over 4

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