/usr/bin/scheme-r5rs		/usr/bin/scheme-r5rs-gambit		10
/usr/bin/scheme-r4rs		/usr/bin/scheme-r4rs-gambit		10
/usr/bin/scheme-srfi-0		/usr/bin/scheme-srfi-0-gambit		10
/usr/bin/scheme-ieee-1178-1990	/usr/bin/scheme-ieee-1178-1990-gambit	10
