diff --git a/flake.nix b/flake.nix
index 282211728..3a392eb10 100644
--- a/flake.nix
+++ b/flake.nix
@@ -105,6 +105,9 @@
           };
 
           settings = {
+            # Horizon stuff
+            doctest-driver-gen.check = false;
+
             # Haskell packages in nixpkgs are often broken in many ways; ergo,
             # it is our responsibility to fix them here.
             fsnotify.check = false;