diff --git a/flake.nix b/flake.nix
index 0869c01..f05e3b3 100644
--- a/flake.nix
+++ b/flake.nix
@@ -133,5 +133,7 @@
           // (vm_test "ssl" ./test/blocks/ssl.nix)
           );
       }
-  );
+  ) // {
+    herculesCI.ciSystems = [ "x86_64-linux" ];
+  };
 }