error loading dm-stuff

[iMac:/Users/kematzy/Code/DataMapper/dm-more/dm-is-list]$ rake spec
(in /Users/kematzy/Code/DataMapper/dm-more/dm-is-list)
rm -r coverage
/Users/kematzy/Code/DataMapper/dm-more/dm-is-list/spec/spec_helper.rb:14: warning: already initialized constant ROOT
/Library/Ruby/Site/1.8/rubygems.rb:279:in `activate': can't activate dm-core (= 0.10.0, runtime) for [], already activated dm-core-0.9.12 for [] (Gem::LoadError)
	from /Library/Ruby/Site/1.8/rubygems/custom_require.rb:35:in `require'
	from /Users/kematzy/Code/DataMapper/dm-more/dm-is-list/lib/dm-is-list.rb:5
	from /Library/Ruby/Site/1.8/rubygems/custom_require.rb:31:in `gem_original_require'
	from /Library/Ruby/Site/1.8/rubygems/custom_require.rb:31:in `require'
	from /Users/kematzy/Code/DataMapper/dm-more/dm-is-list/spec/spec_helper.rb:20
	from /Library/Ruby/Site/1.8/rubygems/custom_require.rb:31:in `gem_original_require'
	from /Library/Ruby/Site/1.8/rubygems/custom_require.rb:31:in `require'
	from /Users/kematzy/Code/DataMapper/dm-more/dm-is-list/spec/integration/album_spec.rb:2
	from /Library/Ruby/Gems/1.8/gems/rspec-1.2.6/lib/spec/runner/example_group_runner.rb:15:in `load'
	from /Library/Ruby/Gems/1.8/gems/rspec-1.2.6/lib/spec/runner/example_group_runner.rb:15:in `load_files'
	from /Library/Ruby/Gems/1.8/gems/rspec-1.2.6/lib/spec/runner/example_group_runner.rb:14:in `each'
	from /Library/Ruby/Gems/1.8/gems/rspec-1.2.6/lib/spec/runner/example_group_runner.rb:14:in `load_files'
	from /Library/Ruby/Gems/1.8/gems/rspec-1.2.6/lib/spec/runner/options.rb:99:in `run_examples'
	from /Library/Ruby/Gems/1.8/gems/rspec-1.2.6/lib/spec/runner.rb:61:in `run'
	from /Library/Ruby/Gems/1.8/gems/rspec-1.2.6/lib/spec/runner.rb:45:in `autorun'
	from /usr/bin/rcov:19
^C/Library/Ruby/Gems/1.8/gems/rcov-0.8.1.2.0/lib/rcov/report.rb:1006:in `create_file': Interrupt
	from /Library/Ruby/Gems/1.8/gems/rcov-0.8.1.2.0/lib/rcov/report.rb:1005:in `open'
	from /Library/Ruby/Gems/1.8/gems/rcov-0.8.1.2.0/lib/rcov/report.rb:1005:in `create_file'
	from /Library/Ruby/Gems/1.8/gems/rcov-0.8.1.2.0/lib/rcov/report.rb:708:in `execute'
	from /Library/Ruby/Gems/1.8/gems/rcov-0.8.1.2.0/lib/rcov/report.rb:125:in `each'
	from /Library/Ruby/Gems/1.8/gems/rcov-0.8.1.2.0/lib/rcov/report.rb:125:in `each_file_pair_sorted'
	from /Library/Ruby/Gems/1.8/gems/rcov-0.8.1.2.0/lib/rcov/report.rb:707:in `execute'
	from /Library/Ruby/Gems/1.8/gems/rcov-0.8.1.2.0/lib/rcov.rb:640:in `dump_coverage_info'
	from /Library/Ruby/Gems/1.8/gems/rcov-0.8.1.2.0/lib/rcov.rb:640:in `each'
	from /Library/Ruby/Gems/1.8/gems/rcov-0.8.1.2.0/lib/rcov.rb:640:in `dump_coverage_info'
	from /Library/Ruby/Gems/1.8/gems/rcov-0.8.1.2.0/bin/rcov:421
	from /Library/Ruby/Gems/1.8/gems/rspec-1.2.6/lib/spec/runner/options.rb:125
rake aborted!
Command /System/Library/Frameworks/Ruby.framework/Versions/1.8/usr/bin/ruby -I"/Library/Ruby/Gems/1.8/gems/rspec-1.2.6/lib" -S rcov \
--exclude lib\/spec,bin\/spec,config\/boot.rb \
--exclude spec --text-summary --sort coverage --sort-reverse -o "coverage" "/Library/Ruby/Gems/1.8/gems/rspec-1.2.6/bin/spec" \
-- "/Users/kematzy/Code/DataMapper/dm-more/dm-is-list/spec/integration/album_spec.rb" \
"/Users/kematzy/Code/DataMapper/dm-more/dm-is-list/spec/integration/list_spec.rb" 
--options spec/spec.opts failed

(See full trace by running task with --trace)
[iMac:/Users/kematzy/Code/DataMapper/dm-more/dm-is-list]$ 

spec_helper.rb

require 'pathname'
require 'rubygems'

gem 'rspec', '~>1.2'
require 'spec'

# gem 'data_objects', '0.9.12'
gem('data_objects', '~>0.9')
require 'data_objects'
# gem 'do_sqlite3', '0.9.12'
gem('do_sqlite3', '~>0.9')
require 'do_sqlite3'

ROOT = Pathname(__FILE__).dirname.parent.expand_path

# use local dm-adjust if running from dm-more directly
lib = ROOT.parent.join('dm-adjust', 'lib').expand_path
$LOAD_PATH.unshift(lib) if lib.directory?

require ROOT + 'lib/dm-is-list'

def load_driver(name, default_uri)
  return false if ENV['ADAPTER'] != name.to_s

  begin
    DataMapper.setup(name, ENV["#{name.to_s.upcase}_SPEC_URI"] || default_uri)
    DataMapper::Repository.adapters[:default] =  DataMapper::Repository.adapters[name]
    true
  rescue LoadError => e
    warn "Could not load do_#{name}: #{e}"
    false
  end
end

ENV['ADAPTER'] ||= 'sqlite3'

HAS_SQLITE3  = load_driver(:sqlite3,  'sqlite3::memory:')
HAS_MYSQL    = load_driver(:mysql,    'mysql://localhost/dm_core_test')
HAS_POSTGRES = load_driver(:postgres, 'postgres://postgres@localhost/dm_core_test')