+The script install.sh does all of this for you, including compilation
+of all contrib modules it can find, and installation of all those that
+pass their tests. You should set the INSTALL_ROOT environment
+variable to /usr or /usr/local as appropriate before starting
+install.sh: e.g.
+
+ # INSTALL_ROOT=/usr/local sh install.sh
+or
+ $ INSTALL_ROOT=/home/me/sbcl sh install.sh
+(if your INSTALL_ROOT is XYZ, SBCL_HOME should be set to
+XYZ/lib/sbcl).