Redmine

Hi all.. I'm upgrading from 2.6.8 to 3.1.2. Well, I was trying to. I tried going to 3.0.6 as well and got the same issue. To start, here is my scripts/about:

$ RAILS_ENV=production script/about 

svn: not found
darcs: not found
bzr: not found
Environment:
  Redmine version                2.6.8.stable
  Ruby version                   2.1.6-p336 (2015-04-13) [amd64-freebsd8]
  Rails version                  3.2.22
  Environment                    production
  Database adapter               PostgreSQL
SCM:
  Mercurial                      3.3.2
  Git                            2.4.0
  Filesystem                     
Redmine plugins:
  redmine_bitbucket_hook         0.1.3

When updating the source to either 3.0.x or 3.1.x and running 'bundle update' I get:

$ bundle update
...
Bundler could not find compatible versions for gem "json":
  In Gemfile:
    rails (= 4.2.3) ruby depends on
      activejob (= 4.2.3) ruby depends on
        activesupport (= 4.2.3) ruby depends on
          json (>= 1.7.7, ~> 1.7) ruby

    json (~> 1.6.5) ruby

$ gem list --local

*** LOCAL GEMS ***

actionmailer (3.2.22, 3.2.21)
actionpack (3.2.22, 3.2.21)
activemodel (3.2.22, 3.2.21)
activerecord (3.2.22, 3.2.21)
activeresource (3.2.22, 3.2.21)
activesupport (3.2.22, 3.2.21)
arel (3.0.3)
builder (3.0.4)
bundle (0.0.1)
bundler (1.9.8)
coderay (1.1.0)
daemons (1.2.3, 1.2.2)
erubis (2.7.0)
eventmachine (1.0.8, 1.0.7)
hike (1.2.3)
htmlentities (4.3.1)
i18n (0.7.0, 0.6.11)
journey (1.0.4)
jquery-rails (3.1.4, 3.1.2)
json (1.7.7)
mail (2.5.4)
mime-types (1.25.1)
multi_json (1.11.2, 1.11.0)
net-ldap (0.3.1)
pg (0.17.1)
polyglot (0.3.5)
rack (1.4.7, 1.4.5)
rack-cache (1.5.1, 1.2)
rack-openid (1.4.2)
rack-ssl (1.3.4)
rack-test (0.6.3)
rails (3.2.22, 3.2.21)
railties (3.2.22, 3.2.21)
rake (10.4.2)
rake-compiler (0.9.3)
rbpdf (1.18.7, 1.18.5)
rdoc (4.2.0, 3.12.2)
redcarpet (3.3.3, 2.3.0)
request_store (1.0.5)
rmagick (2.13.4, 2.13.3)
ruby-openid (2.3.0)
sprockets (2.2.3)
thin (1.6.4, 1.6.3)
thor (0.19.1)
tilt (1.4.1)
treetop (1.4.15)
tzinfo (0.3.45, 0.3.44, 0.3.43)

I tried updating bundle to the latest, 1.10.6, same thing. I tried installing rails, and it's dependencies 1 by 1, which worked, then running bundle update again, same thing. I don't know Ruby or the gem ecosystem that well so I'm at a bit of a loss. I asked in Freenode / #ruby because #redmine was a big of a graveyard. They had me try a few things but nothing worked. They claim it's a broken Gemfile but I can't imagine that's the case. I used the Gemfile straight from the repo (bitbucket.org/redmine/redmine-all, 3.0-stable and 3.1-stable branches) like I always have. Not really sure what else to try here.

Any ideas?

Thanks in advance!

Peter