diff --git a/tidepool/src/lib/systems.nix b/tidepool/src/lib/systems.nix
index afad580..f89d39c 100644
--- a/tidepool/src/lib/systems.nix
+++ b/tidepool/src/lib/systems.nix
@@ -2787,16 +2787,16 @@ in
           ) lib.systems.validate.architecture
           // (builtins.removeAttrs settings [ "system" ]);
 
-          # assertions = builtins.foldl' (
-          #   result:
-          #     { assertion, message }:
-          #       if assertion resolved then
-          #         result
-          #       else builtins.throw message
-          # ) true (resolved.system.abi.assertions or [ ]);
+          assertions = builtins.foldl' (
+            result:
+              { assertion, message }:
+                if assertion resolved then
+                  result
+                else builtins.throw message
+          ) true (resolved.system.abi.assertions or [ ]);
         in
         assert resolved.useAndroidPrebuilt -> resolved.isAndroid;
-        # assert assertions;
+        assert assertions;
         # And finally, return the generated system info.
         lib.types.set "systemWithBuildInfo" resolved;
     };