diff --git a/manifest.dhall b/manifest.dhall
index c2e46d355fa1dfac28aac3b04b7ecb901268903e..44cdc4a06af960bba3f994e82d7cf1f1e3bfe20b 100644
--- a/manifest.dhall
+++ b/manifest.dhall
@@ -1,7 +1,7 @@
 let H = ./horizon.dhall
 
 let callHorizonAdopted
-    : ∀(name : Text) → ∀(revision : Text) → H.Attr H.HsPkg.Type
+    : Text → Text → H.Attr H.HsPkg.Type
     = λ(name : Text) →
       λ(revision : Text) →
         H.callCabal2nix