diff --git a/hosts/hainich/services/hasenloch.nix b/hosts/hainich/services/hasenloch.nix
index a2d4c21..734a49d 100644
--- a/hosts/hainich/services/hasenloch.nix
+++ b/hosts/hainich/services/hasenloch.nix
@@ -10,6 +10,13 @@
     config = { pkgs, config2, ...}: {
       services.engelsystem = {
         enable = true;
+        package = pkgs.engelsystem.overrideAttrs (oldAttrs: rec {
+            version = "3.1.1-r2r";
+            src = pkgs.fetchzip {
+              url = "https://schwe.by/files/engelsystem2.zip";
+              sha256 = "0kqididzlslzrcpx89pf57008lh040ghhhab83sz28zabsm9945q";
+            };
+        });
         domain = "himmel.hacc.earth";
         
         config = {