diff --git a/lib/frontmatter/default.nix b/lib/frontmatter/default.nix
index cd8a302f4..9e34e8f68 100644
--- a/lib/frontmatter/default.nix
+++ b/lib/frontmatter/default.nix
@@ -68,7 +68,7 @@ let
         if (builtins.pathExists readme) then
           (builtins.readFile readme)
         else
-          throw "No README.md found for module ${modulename}";
+          throw "No README.md found for module ${modulename} (expected at ${readme})";
     in
     readmeContents;