This was fixed in mesa 8.0~rc2-0ubuntu5 released on feb 9th, libegl1-mesa-dev was missing a few dependencies and the egl portion of mesa-demos did not build.
mesa (8.0~rc2-0ubuntu5) precise; urgency=low
[ Robert Hooker ]
* debian/control: Add libxcb-glx0-dev to libegl1-mesa-dev depends.
[ Christopher James Halse Rogers ]
* debian/control: Add libx11-xcb-dev to libegl1-mesa-dev depends.
This was fixed in mesa 8.0~rc2-0ubuntu5 released on feb 9th, libegl1-mesa-dev was missing a few dependencies and the egl portion of mesa-demos did not build.
mesa (8.0~rc2-0ubuntu5) precise; urgency=low
[ Robert Hooker ]
* debian/control: Add libxcb-glx0-dev to libegl1-mesa-dev depends.
[ Christopher James Halse Rogers ]
* debian/control: Add libx11-xcb-dev to libegl1-mesa-dev depends.
Date: Thu, 09 Feb 2012 16:49:26 +1100