Problem installing nokogiri - "Package libxslt-dev is a virtual package"

I'm trying to install the nokogiri gem in ubuntu. I've followed the instructions on this page: http://nokogiri.org/tutorials/installing_nokogiri.html

I've done the first steps ok:

# ruby developer packages
sudo apt-get install ruby1.8-dev ruby1.8 ri1.8 rdoc1.8 irb1.8
sudo apt-get install libreadline-ruby1.8 libruby1.8 li开发者_运维知识库bopenssl-ruby

But when i try to do the next step, sudo apt-get install libxslt-dev, i get this error:

Package libxslt-dev is a virtual package provided by:
libxslt1-dev 1.1.24-2ubuntu2
You should explicitly select one to install.
E: Package libxslt-dev has no installation candidate

I've no idea what this means, or how to select one (one of what?). Can anyone help?

---

Analyse your 'log':

Package libxslt-dev is a virtual package provided by:
libxslt1-dev 1.1.24-2ubuntu2
You should explicitly select one to install.
E: Package libxslt-dev has no installation candidate

Because that libxslt-dev is a virtual package, you have to install one of following packages (here, there is just one package named 'libxslt1-dev').

So, just tape :

sudo apt-get install libxslt1-dev