diff --git a/Tools/gnuplot/build b/Tools/gnuplot/build
index 5b72923..f321704 100755
--- a/Tools/gnuplot/build
+++ b/Tools/gnuplot/build
@@ -1,5 +1,7 @@
 #!/usr/bin/env modbuild
 
+SOURCE_URL="https://sourceforge.net/projects/gnuplot/files/$P/$V/$P-$V.tar.gz"
+
 pbuild::configure() {
 	"${MODULE_SRCDIR}"/configure \
 		--prefix="${PREFIX}" \