use_fossil='0'
	if echo "${TCLVERS}" | grep '^cvs_' >/dev/null; then
		use_fossil='1'
	elif echo "${TCLVERS}" | grep '^fossil_' >/dev/null; then
		use_fossil='1'
	fi

	if [ -d 'buildsrc' ]; then
		# Override here to avoid downloading tarball from Fossil if we
		# have a particular tree already available.
		use_fossil='0'
	fi

	if [ "${use_fossil}" = "1" ]; then
		(       
			FOSSILDATE="$(cat "${TCLFOSSILDATE}" 2>/dev/null)"

			cd src || exit 1

                        
			tar -cf - "tk${TCLVERS}" | gzip -c > "../../${SRC}"

			cd ..
			rm -rf "${workdir}"
		)
	else
		if [ ! -d 'buildsrc' ]; then
		rm -f "${SRC}.tmp"
		wget -O "${SRC}.tmp" "${SRCURL}" || exit 1
		mv "${SRC}.tmp" "${SRC}"
			rm -f "${SRC}.tmp"
			wget -O "${SRC}.tmp" "${SRCURL}" || exit 1
			mv "${SRC}.tmp" "${SRC}"
		fi
	fi
fi

(
	cd 'build' || exit 1

	if [ ! -d '../buildsrc' ]; then