...

---- Unsatisfied dependencies detected during ----
----       MLEHMANN/JSON-XS-3.02.tar.gz       ----
    Canary::Stability [build_requires]
Running install for module 'Canary::Stability'
Fetching with LWP:
http://mirror.as24220.net/pub/cpan/authors/id/M/ML/MLEHMANN/Canary-Stability-2012.tar.gz
Checksum for /Users/ken/.cpan/sources/authors/id/M/ML/MLEHMANN/Canary-Stability-2012.tar.gz ok
Configuring M/ML/MLEHMANN/Canary-Stability-2012.tar.gz with Makefile.PL
Checking if your kit is complete...
Looks good
Generating a Unix-style Makefile
Writing Makefile for Canary::Stability
Writing MYMETA.yml and MYMETA.json
(/Users/ken/perl5/perlbrew/perls/perl-5.24.0t/bin/perl Makefile.PL exited with 0)
CPAN::Reporter: Makefile.PL result is 'pass', No errors.
  MLEHMANN/Canary-Stability-2012.tar.gz
  /Users/ken/perl5/perlbrew/perls/perl-5.24.0t/bin/perl Makefile.PL -- OK
Running make for M/ML/MLEHMANN/Canary-Stability-2012.tar.gz
cp Stability.pm blib/lib/Canary/Stability.pm
Manifying 1 pod document
(/usr/bin/make exited with 0)
CPAN::Reporter: make result is 'pass', No errors.
  MLEHMANN/Canary-Stability-2012.tar.gz
  /usr/bin/make -- OK
Running make test
No tests defined for Canary::Stability extension.
(/usr/bin/make test exited with 0)
CPAN::Reporter: Test result is 'unknown', No tests provided.
CPAN::Reporter: preparing a CPAN Testers report for Canary-Stability-2012
Do you want to review or edit the test report? (yes/no) [no]
Do you want to send the report? (yes/no) [yes]
CPAN::Reporter: sending test report with 'unknown' via Metabase
  MLEHMANN/Canary-Stability-2012.tar.gz
  /usr/bin/make test -- OK
Running make install
Manifying 1 pod document
Installing /Users/ken/perl5/perlbrew/perls/perl-5.24.0t/lib/site_perl/5.24.0/Canary/Stability.pm
Installing /Users/ken/perl5/perlbrew/perls/perl-5.24.0t/man/man3/Canary::Stability.3
Appending installation info to /Users/ken/perl5/perlbrew/perls/perl-5.24.0t/lib/5.24.0/darwin-thread-multi-2level/perllocal.pod
  MLEHMANN/Canary-Stability-2012.tar.gz
  /usr/bin/make install  -- OK
  MLEHMANN/JSON-XS-3.02.tar.gz
  Has already been unwrapped into directory /Users/ken/.cpan/build/JSON-XS-3.02-0
Configuring M/ML/MLEHMANN/JSON-XS-3.02.tar.gz with Makefile.PL

***
*** Canary::Stability COMPATIBILITY AND SUPPORT CHECK
*** =================================================
***
*** Hi!
***
*** I do my best to provide predictable and reliable software.
***
*** However, in recent releases, P5P (who maintain perl) have been
*** introducing regressions that are sometimes subtle and at other times
*** catastrophic, often for personal preferences with little or no concern
*** for existing code, most notably CPAN.
***
*** For this reason, it has become very hard for me to maintain the level
*** of reliability and support I have committed myself to in the past, at
*** least with some perl versions: I simply can't keep up working around new
*** bugs or gratituous incompatibilities, and in turn you might suffer from
*** unanticipated problems.
***
*** Therefore I have introduced a support and compatibility check, the results
*** of which follow below, together with a FAQ and some recommendations.
***
*** This check is just to let you know that there might be a risk, so you can
*** make judgement calls on how to proceed - it will not keep the module from
*** installing or working.
***
*** The stability canary says: (nothing, it was driven away by harsh weather)
***
*** It seems you are running perl version 5.024000, likely the "official" or
*** "standard" version. While there is nothing wrong with doing that,
*** standard perl versions 5.022 and up are not supported by JSON::XS.
*** While this might be fatal, it might also be all right - if you run into
*** problems, you might want to downgrade your perl or switch to the
*** stability branch.
***
*** If everything works fine, you can ignore this message.
***
*** Stability canary mini-FAQ:
***
*** Do I need to do anything?
***    With luck, no. While some distributions are known to fail
***    already, most should probably work. This message is here
***    to alert you that your perl is not supported by JSON::XS,
***    and if things go wrong, you either need to downgrade, or
***    sidegrade to the stability variant of your perl version,
***    or simply live with the consequences.
***
*** What is this canary thing?
***    It's purpose is to check support status of JSON::XS with
***    respect to your perl version.
***
*** What is this "stability branch"?
***    It's a branch or fork of the official perl, by schmorp, to
***    improve stability and compatibility with existing modules.
***
*** How can I skip this prompt on automated installs?
***    Set PERL_CANARY_STABILITY_NOPROMPT=1 in your environment.
***    More info is in the Canary::Stability manpage.
***
*** Long version of this FAQ: http://stableperl.schmorp.de/faq.html
*** Stability Branch homepage: http://stableperl.schmorp.de/
***

Continue anyways?  [y]

... I did continue and eventually got a successful installation message ...

  MLEHMANN/JSON-XS-3.02.tar.gz
  /usr/bin/make install  -- OK