# dpkg -i xlibmesa-glu-dev_4.3.0.dfsg.1-14sarge1_i386.deb
dpkg: regarding xlibmesa-glu-dev_4.3.0.dfsg.1-14sarge1_i386.deb containing xlibmesa-glu-dev:
 xlibmesa-glu-dev conflicts with libglu-dev
  libglu1-mesa-dev provides libglu-dev and is installed.
dpkg: error processing xlibmesa-glu-dev_4.3.0.dfsg.1-14sarge1_i386.deb (--install):
 conflicting packages - not installing xlibmesa-glu-dev
Errors were encountered while processing:
 xlibmesa-glu-dev_4.3.0.dfsg.1-14sarge1_i386.deb