Error installing Nokogiri via Bundler on Windows - ruby

Question

I'm trying to set up and run the Extreme Startup coding dojo on my Windows machine.
When I reach the bundle install step, I get this error message:
$ bundle install
Fetching gem metadata from https://rubygems.org/............
Fetching version metadata from https://rubygems.org/..
Resolving dependencies...
Installing builder 3.2.2
Installing nokogiri 1.4.5 with native extensions
Gem::Ext::BuildError: ERROR: Failed to build gem native extension.
c:/Ruby22-x64/bin/ruby.exe -r ./siteconf20150826-3512-ilnke5.rb extconf.rb
*** extconf.rb failed ***
Could not create Makefile due to some reason, probably lack of necessary
libraries and/or headers. Check the mkmf.log file for more details. You may
need configuration options.
Provided configuration options:
--with-opt-dir
--without-opt-dir
--with-opt-include
--without-opt-include=${opt-dir}/include
--with-opt-lib
--without-opt-lib=${opt-dir}/lib
--with-make-prog
--without-make-prog
--srcdir=.
--curdir
--ruby=c:/Ruby22-x64/bin/$(RUBY_BASE_NAME)
extconf.rb:10:in `<main>': uninitialized constant Config (NameError)
extconf failed, exit code 1
Gem files will remain installed in c:/Ruby22-x64/lib/ruby/gems/2.2.0/gems/nokogiri-1.4.5 for inspection.
Results logged to c:/Ruby22-x64/lib/ruby/gems/2.2.0/extensions/x64-mingw32/2.2.0/nokogiri-1.4.5/gem_make.out
An error occurred while installing nokogiri (1.4.5), and Bundler cannot
continue.
Make sure that `gem install nokogiri -v '1.4.5'` succeeds before bundling.
According to the documentation for Nokogiri, it just ought to work, and in a sense, it does, because if I issue the command gem install nokogiri, it does work, but installs nokogiri-1.6.6.2-x64-mingw32.
As I understand the error message from bundle install, it specifically wants version 1.4.5. At least, even with nokogiri-1.6.6.2-x64-mingw32 installed, bundle install still fails with the above error message.
This is likely to be a simple problem, but since I'm a novice ruby user, I could use some help.
I've already tried the suggestions from Error installing Nokogiri on bundle install but already installed, but none of them work.

Answer 1

This particular version of Nokogiri is listed in Gemfile.lock. You can remove that file, run bundle install again and see if it works.
This is more a workaround than a proper solution, but dependencies in Gemfile.lock are quite old so it would be a good thing to refresh them anyway.