Cannot install redmine

Redmine configuration crashes Rake. I've tried this with both redmine-sqlite and redmine-pgsql

$ sudo apt-get install redmine redmine-pgsql

Reading package lists... Done
Building dependency tree
Reading state information... Done
Suggested packages:
  ruby-rmagick ruby-openid bzr cvs mercurial
The following NEW packages will be installed:
  redmine redmine-pgsql
0 upgraded, 2 newly installed, 0 to remove and 2 not upgraded.
Need to get 0 B/4,966 kB of archives.
After this operation, 12.1 MB of additional disk space will be used.
Preconfiguring packages ...
Selecting previously unselected package redmine-pgsql.
(Reading database ... 695967 files and directories currently installed.)
Unpacking redmine-pgsql (from .../redmine-pgsql_1.4.4+dfsg1-1_all.deb) ...
Selecting previously unselected package redmine.
Unpacking redmine (from .../redmine_1.4.4+dfsg1-1_all.deb) ...
Setting up redmine-pgsql (1.4.4+dfsg1-1) ...
Setting up redmine (1.4.4+dfsg1-1) ...
dbconfig-common: writing config to /etc/dbconfig-common/redmine/instances/default.conf

Creating config file /etc/dbconfig-common/redmine/instances/default.conf with new version

Creating config file /etc/redmine/default/database.yml.new with new version
creating postgres user redmine: success.
verifying creation of user: success.
creating database redmine_default: success.
verifying database redmine_default exists: success.
dbconfig-common: flushing administrative password

Creating config file /etc/redmine/default/database.yml with new version
NOTE: Gem.source_index is deprecated, use Specification. It will be removed on or after 2011-11-01.
Gem.source_index called from /usr/share/redmine/vendor/rails/railties/lib/rails/gem_dependency.rb:21.
/usr/lib/ruby/vendor_ruby/rake/version.rb:2: warning: already initialized constant VERSION
/usr/lib/ruby/vendor_ruby/rake/version.rb:5: warning: already initialized constant MAJOR
/usr/lib/ruby/vendor_ruby/rake/version.rb:5: warning: already initialized constant MINOR
/usr/lib/ruby/vendor_ruby/rake/version.rb:5: warning: already initialized constant BUILD
/usr/lib/ruby/vendor_ruby/rake/version.rb:5: warning: already initialized constant PATCH
/usr/lib/ruby/vendor_ruby/rake/version.rb:6: warning: already initialized constant NUMBERS
/usr/lib/ruby/vendor_ruby/rake.rb:27: warning: already initialized constant RAKEVERSION
/usr/lib/ruby/vendor_ruby/rake/early_time.rb:17: warning: already initialized constant EARLY
/usr/lib/ruby/vendor_ruby/rake/alt_system.rb:32: warning: already initialized constant WINDOWS
/usr/lib/ruby/vendor_ruby/rake/application.rb:31: warning: already initialized constant DEFAULT_RAKEFILES
WARNING: Possible conflict with Rake extension: String#ext already exists
WARNING: Possible conflict with Rake extension: String#pathmap already exists
/usr/lib/ruby/vendor_ruby/rake/task_arguments.rb:77: warning: already initialized constant EMPTY_TASK_ARGS
/usr/lib/ruby/vendor_ruby/rake/invocation_chain.rb:49: warning: already initialized constant EMPTY
/usr/lib/ruby/vendor_ruby/rake/file_utils.rb:9: warning: already initialized constant RUBY
/usr/lib/ruby/vendor_ruby/rake/file_utils.rb:86: warning: already initialized constant LN_SUPPORTED
/usr/lib/ruby/vendor_ruby/rake/file_utils_ext.rb:16: warning: already initialized constant DEFAULT
/usr/lib/ruby/vendor_ruby/rake/dsl_definition.rb:150: warning: already initialized constant DeprecatedCommands
/usr/lib/ruby/vendor_ruby/rake/file_list.rb:44: warning: already initialized constant ARRAY_METHODS
/usr/lib/ruby/vendor_ruby/rake/file_list.rb:47: warning: already initialized constant MUST_DEFINE
/usr/lib/ruby/vendor_ruby/rake/file_list.rb:51: warning: already initialized constant MUST_NOT_DEFINE
/usr/lib/ruby/vendor_ruby/rake/file_list.rb:55: warning: already initialized constant SPECIAL_RETURN
/usr/lib/ruby/vendor_ruby/rake/file_list.rb:61: warning: already initialized constant DELEGATING_METHODS
/usr/lib/ruby/vendor_ruby/rake/file_list.rb:364: warning: already initialized constant DEFAULT_IGNORE_PATTERNS
/usr/lib/ruby/vendor_ruby/rake/file_list.rb:370: warning: already initialized constant DEFAULT_IGNORE_PROCS
/usr/lib/ruby/vendor_ruby/rake.rb:68: warning: already initialized constant FileList
/usr/lib/ruby/vendor_ruby/rake.rb:69: warning: already initialized constant RakeFileUtils
rake aborted!
stack level too deep

(See full trace by running task with --trace)
dpkg: error processing redmine (--configure):
 subprocess installed post-installation script returned error exit status 1
No apport report written because MaxReports is reached already
                                                              Errors were encountered while processing:
 redmine
E: Sub-process /usr/bin/dpkg returned an error code (1)

ProblemType: Bug
DistroRelease: Ubuntu 12.10
Package: redmine (not installed)
ProcVersionSignature: Ubuntu 3.5.0-18.29-generic 3.5.7
Uname: Linux 3.5.0-18-generic x86_64
NonfreeKernelModules: nvidia
ApportVersion: 2.6.1-0ubuntu6
Architecture: amd64
Date: Thu Nov 15 15:53:20 2012
InstallationDate: Installed on 2012-05-25 (173 days ago)
InstallationMedia: Ubuntu 12.04 LTS "Precise Pangolin" - Release amd64 (20120425)
MarkForUpload: True
ProcEnviron:
 PATH=(custom, no user)
 XDG_RUNTIME_DIR=<set>
 LANG=en_US.UTF-8
 SHELL=/bin/zsh
SourcePackage: redmine
UpgradeStatus: Upgraded to quantal on 2012-10-22 (23 days ago)