diff --git a/.hydra/declarative-jobsets.nix b/.hydra/declarative-jobsets.nix
index 0299362..3626842 100644
--- a/.hydra/declarative-jobsets.nix
+++ b/.hydra/declarative-jobsets.nix
@@ -14,7 +14,7 @@ let
     emailoverride = "";
     keepnr = 1;
     type = 1;
-    flake = "${info.head.repo.html_url}/archive/${info.head.sha}.tar.gz";
+    flake = "${info.head.repo.html_url}/archive/${info.head.ref}.tar.gz";
     inputs = {
       gitea_repo_name = {
         type = "string";