diff --git a/README.md b/README.md
index 8a6f86c..9ac5b36 100644
--- a/README.md
+++ b/README.md
@@ -2,3 +2,7 @@ stackage-server
 ===============
 
 Server for stable, curated Haskell package sets
+
+Code builds with the Stackage snapshot:
+
+    remote-repo: stackage:http://www.stackage.org/stackage/aecbf72b568a63e86a971311fee5475f076043cc