function gvm_use() {
	if [[ -n $1 ]]; then
		fuzzy_match=`ls $GVM_ROOT/gos | grep "$1"`
		if [[ $? != 0 ]]; then
		  echo "Invalid version $1"
		  exit 1
		fi
		. $GVM_ROOT/environments/$fuzzy_match
		if [[ "$2" == "--default" ]]; then
			cp $GVM_ROOT/environments/$fuzzy_match $GVM_ROOT/environments/default
		fi
	else
		echo "ERROR: Please specifiy the version"
		return 1
	fi
	echo "Now using version $fuzzy_match"
}