PREUN

/bin/sh

[ "$1" != 0 ] || /usr/sbin/update-alternatives --remove nbook.bin \
	/usr/share/games/sjeng/nbook-medium.bin

POSTIN

/bin/sh

/usr/sbin/update-alternatives --install /usr/share/games/sjeng/nbook.bin \
	nbook.bin /usr/share/games/sjeng/nbook-medium.bin 20