diff --git a/src/Foundation/Authorization.hs b/src/Foundation/Authorization.hs
index b1ead3481..887242249 100644
--- a/src/Foundation/Authorization.hs
+++ b/src/Foundation/Authorization.hs
@@ -1,5 +1,5 @@
 {-# LANGUAGE UndecidableInstances #-}
-{-# OPTIONS_GHC -fno-warn-redundant-constraints -fprof-auto-top #-}
+{-# OPTIONS_GHC -fno-warn-redundant-constraints #-}
 
 module Foundation.Authorization
   ( evalAccess, evalAccessFor, evalAccessWith
diff --git a/src/Foundation/SiteLayout.hs b/src/Foundation/SiteLayout.hs
index 770e08f42..8a6d86e2f 100644
--- a/src/Foundation/SiteLayout.hs
+++ b/src/Foundation/SiteLayout.hs
@@ -1,5 +1,4 @@
 {-# LANGUAGE UndecidableInstances #-} -- for `MemcachedKeyFavourites`
-{-# OPTIONS_GHC -fprof-auto-top #-}
 
 module Foundation.SiteLayout
   ( siteLayout', siteLayout
diff --git a/src/Foundation/Yesod/Middleware.hs b/src/Foundation/Yesod/Middleware.hs
index c57f7b31c..c8967cfaa 100644
--- a/src/Foundation/Yesod/Middleware.hs
+++ b/src/Foundation/Yesod/Middleware.hs
@@ -1,4 +1,4 @@
-{-# OPTIONS_GHC -O0 -fasm -fprof-auto-top #-}
+{-# OPTIONS_GHC -O0 -fasm #-}
 
 module Foundation.Yesod.Middleware
   ( yesodMiddleware
diff --git a/src/Jobs.hs b/src/Jobs.hs
index 62a32f998..97c1e7a61 100644
--- a/src/Jobs.hs
+++ b/src/Jobs.hs
@@ -1,5 +1,3 @@
-{-# OPTIONS_GHC -fprof-auto-top #-}
-
 module Jobs
   ( module Types
   , module Jobs.Queue
diff --git a/stack.nix b/stack.nix
index 0885ab569..53fb60f6b 100644
--- a/stack.nix
+++ b/stack.nix
@@ -9,7 +9,7 @@ in pkgs.haskell.lib.buildStackProject {
   inherit (haskellPackages) stack;
   name = "stackenv";
   buildInputs = (with pkgs;
-    [ postgresql zlib libsodium gmp
+    [ postgresql zlib libsodium gmp llvm_9
     ]) ++ (with haskellPackages;
     [ yesod-bin happy alex
     ]);