x-window-system-dev I NEED HELP!!!

[volksgewer]

I am trying to get Steam (A game server) to run on my computer. And I am using a Howto. And everytime I use this sudo apt-get install cvs build-essential bison flex-old libasound2-dev x-window-system-dev libpng12-dev libjpeg62-dev libfreetype6-dev libxrender-dev libttf2 libttf-dev msttcorefonts libfontconfig1-dev it says that couldent find package x-window-system-dev. If some one could help me I would like it very much.

[happyhamster]

Try xserver-xorg-dev.

[volksgewer]

Thanks for helping but it did not work.