diff --git a/third_party/smtprelay/default.nix b/third_party/smtprelay/default.nix
index 1a68245e9..b46e02076 100644
--- a/third_party/smtprelay/default.nix
+++ b/third_party/smtprelay/default.nix
@@ -15,7 +15,7 @@ pkgs.buildGoModule rec {
 
   meta = with lib; {
     description = "Simple Golang SMTP relay/proxy server";
-    homepage = https://github.com/decke/smtprelay;
+    homepage = "https://github.com/decke/smtprelay";
     license = licenses.mit;
   };
 }