if [ -n "$SBCL_HOME" -a "$INSTALL_ROOT/lib/sbcl" != "$SBCL_HOME" ];then
echo SBCL_HOME environment variable is set, and conflicts with INSTALL_ROOT.
echo Aborting installation. Unset one or reset the other, then try again
if [ -n "$SBCL_HOME" -a "$INSTALL_ROOT/lib/sbcl" != "$SBCL_HOME" ];then
echo SBCL_HOME environment variable is set, and conflicts with INSTALL_ROOT.
echo Aborting installation. Unset one or reset the other, then try again