diff --git a/sci-astronomy/skymaker/metadata.xml b/sci-astronomy/skymaker/metadata.xml
index 0789a77189b33..ca82549725023 100644
--- a/sci-astronomy/skymaker/metadata.xml
+++ b/sci-astronomy/skymaker/metadata.xml
@@ -12,4 +12,7 @@
 		build a realistic Point Spread Function, generate a list of stars and
 		galaxies. Galaxies are modeled analytically.
 	</longdescription>
+	<upstream>
+		<remote-id type="github">astromatic/skymaker</remote-id>
+	</upstream>
 </pkgmetadata>