This page is intended for cases where the process at OpenSCAD_User_Manual/Building_on_Linux/UNIX has failed for some reason. Please file an issue on OpenSCAD's github if the above process did not work for you. In the meantime, these instructions might provide a workaround solution for you.
If your system already has an outdated binary CGAL package installed (such as libcgal-dev) you best remove it with something like 'apt-get purge libcgal-dev'.
If you custom-compiled BOOST, set the BOOST_ROOT environment variable to the installation location
Download CGAL from  . Try to get the latest version.