title: git push heroku failing because trying to install development gems. BUNDLE_WITHOUT command not working
body: <p>I get an error after issuing the git push heroku command.  This initially looked like something to be solved by using the heroku config command to bundle without the development:test gems.  However, I used that command as discussed in this similar writeup [ <a href="https://stackoverflow.com/questions/5545450/herokus-trying-to-install-development-gems-even-after-ive-told-it-not-to">Heroku&#39;s trying to install development gems even after I&#39;ve told it not to</a> ] and it still doesn't work.</p>
  
  <p>The line "Using --without development:test" in the push message below seems to indicate the BUNDLE_WITHOUT config command worked, so maybe this is a gemfile or other issue?</p>
  
  <p>Thanks!</p>
  
  <pre><code>$ git push heroku
  Counting objects: 64, done.
  Delta compression using up to 2 threads.
  Compressing objects: 100% (42/42), done.
  Writing objects: 100% (48/48), 6.03 KiB, done.
  Total 48 (delta 15), reused 0 (delta 0)
  
  -----&gt; Heroku receiving push
  -----&gt; Rails app detected
  -----&gt; Detected Rails is not set to serve static_assets
         Installing rails3_serve_static_assets... done
  -----&gt; Configure Rails 3 to disable x-sendfile
         Installing rails3_disable_x_sendfile... done
  -----&gt; Configure Rails to log to stdout
         Installing rails_log_stdout... done
  -----&gt; Gemfile detected, running Bundler version 1.0.7
         Unresolved dependencies detected; Installing...
         Using --without development:test
         Fetching source index for http://rubygems.org/
         Installing rake (0.8.7) 
         Installing ZenTest (4.5.0) 
         Installing abstract (1.0.0) 
         Installing activesupport (3.0.3) 
         Installing builder (2.1.2) 
         Installing i18n (0.5.0) 
         Installing activemodel (3.0.3) 
         Installing erubis (2.6.6) 
         Installing rack (1.2.2) 
         Installing rack-mount (0.6.14) 
         Installing rack-test (0.5.7) 
         Installing tzinfo (0.3.25) 
         Installing actionpack (3.0.3) 
         Installing mime-types (1.16) 
         Installing polyglot (0.3.1) 
         Installing treetop (1.4.9) 
         Installing mail (2.2.15) 
         Installing actionmailer (3.0.3) 
         Installing arel (2.0.9) 
         Installing activerecord (3.0.3) 
         Installing activeresource (3.0.3) 
         Installing autotest (4.4.6) 
         Installing sys-uname (0.8.5) with native extensions 
         Installing autotest-fsevent (0.2.5) with native extensions /usr/ruby1.8.7/lib/ruby/site_ruby/1.8/rubygems/installer.rb:483:in `build_extensions': ERROR: Failed to build gem native extension. (Gem::Installer::ExtensionBuildError)
  
         /usr/ruby1.8.7/bin/ruby extconf.rb 
         extconf.rb:19: Only Darwin (Mac OS X) systems are supported (RuntimeError)
  
  
         Gem files will remain installed in /disk1/tmp/build_258oz7hi5972n/.bundle/gems/ruby/1.8/gems/autotest-fsevent-0.2.5 for inspection.
         Results logged to /disk1/tmp/build_258oz7hi5972n/.bundle/gems/ruby/1.8/gems/autotest-fsevent-0.2.5/ext/fsevent/gem_make.out
          from /usr/ruby1.8.7/lib/ruby/site_ruby/1.8/rubygems/installer.rb:446:in `each'
          from /usr/ruby1.8.7/lib/ruby/site_ruby/1.8/rubygems/installer.rb:446:in `build_extensions'
          from /usr/ruby1.8.7/lib/ruby/site_ruby/1.8/rubygems/installer.rb:198:in `install'
          from /usr/ruby1.8.7/lib/ruby/gems/1.8/gems/bundler-1.0.7/lib/bundler/source.rb:95:in `install'
          from /usr/ruby1.8.7/lib/ruby/gems/1.8/gems/bundler-1.0.7/lib/bundler/installer.rb:55:in `run'
          from /usr/ruby1.8.7/lib/ruby/gems/1.8/gems/bundler-1.0.7/lib/bundler/spec_set.rb:12:in `each'
          from /usr/ruby1.8.7/lib/ruby/gems/1.8/gems/bundler-1.0.7/lib/bundler/spec_set.rb:12:in `each'
          from /usr/ruby1.8.7/lib/ruby/gems/1.8/gems/bundler-1.0.7/lib/bundler/installer.rb:44:in `run'
          from /usr/ruby1.8.7/lib/ruby/gems/1.8/gems/bundler-1.0.7/lib/bundler/installer.rb:8:in `install'
          from /usr/ruby1.8.7/lib/ruby/gems/1.8/gems/bundler-1.0.7/lib/bundler/cli.rb:225:in `install'
          from /usr/ruby1.8.7/lib/ruby/gems/1.8/gems/bundler-1.0.7/lib/bundler/vendor/thor/task.rb:22:in `send'
          from /usr/ruby1.8.7/lib/ruby/gems/1.8/gems/bundler-1.0.7/lib/bundler/vendor/thor/task.rb:22:in `run'
          from /usr/ruby1.8.7/lib/ruby/gems/1.8/gems/bundler-1.0.7/lib/bundler/vendor/thor/invocation.rb:118:in `invoke_task'
          from /usr/ruby1.8.7/lib/ruby/gems/1.8/gems/bundler-1.0.7/lib/bundler/vendor/thor.rb:246:in `dispatch'
          from /usr/ruby1.8.7/lib/ruby/gems/1.8/gems/bundler-1.0.7/lib/bundler/vendor/thor/base.rb:389:in `start'
          from /usr/ruby1.8.7/lib/ruby/gems/1.8/gems/bundler-1.0.7/bin/bundle:13
          from /usr/ruby1.8.7/bin/bundle:19:in `load'
          from /usr/ruby1.8.7/bin/bundle:19
         FAILED: http://devcenter.heroku.com/articles/bundler
   !     Heroku push rejected, failed to install gems via Bundler
  
  error: hooks/pre-receive exited with error code 1
  To git@heroku.com:blooming-mountain-199.git
   ! [remote rejected] master -&gt; master (pre-receive hook declined)
  error: failed to push some refs to 'git@heroku.com:blooming-mountain-199.git'
  </code></pre>
  
  <p>Gemfile...</p>
  
  <pre><code>source 'http://rubygems.org'
  
  gem 'rails', '3.0.3'
  
  gem 'sqlite3', '1.3.3', :require =&gt; 'sqlite3'
  
  gem 'gravatar_image_tag', '1.0.0.pre2'
  gem 'will_paginate', '3.0.pre2'
  
  gem "nokogiri"
  gem "geokit"
  gem "rack", "~&gt;1.1"
  
  group :development, :test do
    gem 'rspec-rails', '2.5.0'
    gem 'annotate-models', '1.0.4'
    gem 'faker', '0.3.1'
    gem 'autotest-fsevent' if RUBY_PLATFORM =~ /darwin/
    gem 'rspec', '2.5.0'
    gem 'webrat', '0.7.1'
    gem 'spork', '0.9.0.rc4'
    gem 'factory_girl_rails', '1.0'
  
    gem 'ZenTest'
    gem 'autotest'
    gem 'autotest-rails'
    gem 'autotest-growl'
  end
  </code></pre>