bundle install がfogで失敗

現在私はrails tutorialをやっています
Gemfileに

ruby
1gem 'fog'

とやると

Fetching ovirt-engine-sdk 4.2.4
Installing ovirt-engine-sdk 4.2.4 with native extensions
Gem::Ext::BuildError: ERROR: Failed to build gem native extension.

current directory:
C:/Uru/ruby_version/Ruby24/Ruby24-x64/lib/ruby/gems/2.4.0/gems/ovirt-engine-sdk-4.2.4/ext/ovirtsdk4c
C:/Uru/ruby_version/Ruby24/Ruby24-x64/bin/ruby.exe -r
./siteconf20181001-17128-qjvv1n.rb extconf.rb
checking for xml2-config... no
*** 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:/Uru/ruby_version/Ruby24/Ruby24-x64/bin/$(RUBY_BASE_NAME)
        --with-libxml2-config
        --without-libxml2-config
        --with-pkg-config
        --without-pkg-config
extconf.rb:29:in `<main>': The "libxml2" package isn't available. (RuntimeError)

To see why this extension failed to compile, please check the mkmf.log which can
be found here:

C:/Uru/ruby_version/Ruby24/Ruby24-x64/lib/ruby/gems/2.4.0/extensions/x64-mingw32/2.4.0/ovirt-engine-sdk-4.2.4/mkmf.log

extconf failed, exit code 1

Gem files will remain installed in
C:/Uru/ruby_version/Ruby24/Ruby24-x64/lib/ruby/gems/2.4.0/gems/ovirt-engine-sdk-4.2.4
for inspection.
Results logged to
C:/Uru/ruby_version/Ruby24/Ruby24-x64/lib/ruby/gems/2.4.0/extensions/x64-mingw32/2.4.0/ovirt-engine-sdk-4.2.4/gem_make.out

An error occurred while installing ovirt-engine-sdk (4.2.4), and Bundler cannot
continue.
Make sure that `gem install ovirt-engine-sdk -v '4.2.4' --source
'https://rubygems.org/'` succeeds before bundling.

In Gemfile:
  fog was resolved to 2.0.0, which depends on
    fog-ovirt was resolved to 1.1.2, which depends on
      ovirt-engine-sdk

とエラーが出てきます。
ただしgemをfogでなくfog-awsにするとうまくいきます。とはいうものの自分はawsを使う予定はありません。どうすればいいでしょうか？