@@ -38,10 +38,16 @@
 		use_fossil='1'
 
 		FOSSILTAG=$(echo "${TCLVERS}" | sed 's/^fossil_//g')
 	fi
 	export FOSSILTAG
+
+	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
 		(
 			cd src || exit 1
 
@@ -91,13 +97,15 @@
 			cd ..
 
 			rm -rf "${workdir}"
 		) || exit 1
 	else
-		rm -f "${SRC}.tmp"
-		wget -O "${SRC}.tmp" "${SRCURL}" || exit 1
-		mv "${SRC}.tmp" "${SRC}"
+		if [ ! -d 'buildsrc' ]; then
+			rm -f "${SRC}.tmp"
+			wget -O "${SRC}.tmp" "${SRCURL}" || exit 1
+			mv "${SRC}.tmp" "${SRC}"
+		fi
 	fi
 fi
 
 (
 	cd 'build' || exit 1