Vagrant cannot install nokogiri-dependent plugins

Question

I\'m trying to install the rackspace plugin for vagrant (1.5.1):

vagrant plugin install vagrant-rackspace

But it complains

Answer 1

The posted solutions didn't work for me. Instead I needed to specify the libxml2, libxslt and libiconv that I installed with homebrew (Do this first).

I installed the gem manually with the embedded ruby with the following [very concise] command line:

    /Applications/Vagrant/embedded/bin/gem install \ # select the embedded ruby
      --install-dir ~/.vagrant.d/gems \              # install to the vagrant dir
      nokogiri -v '1.6.2.1' -- \                     # pass options to nokogiri install
      --with-xml2-include=/usr/local/Cellar/libxml2/2.7.8/include/libxml2 \
      --with-xml2-lib=/usr/local/Cellar/libxml2/2.7.8/lib \
      --with-xslt-dir=/usr/local/Cellar/libxslt/1.1.26 \
      --with-iconv-include=/usr/local/Cellar/libiconv/1.13.1/include \
      --with-iconv-lib=/usr/local/Cellar/libiconv/1.13.1/lib