diff --git a/pkgs/development/haskell-modules/configuration-ghc-head.nix b/pkgs/development/haskell-modules/configuration-ghc-head.nix
index cbfd4b84b2f..2b136c6bf83 100644
--- a/pkgs/development/haskell-modules/configuration-ghc-head.nix
+++ b/pkgs/development/haskell-modules/configuration-ghc-head.nix
@@ -11,8 +11,7 @@ with haskellLib;
 
 self: super: {
 
-  # This compiler version needs llvm 6.x.
-  llvmPackages = pkgs.llvmPackages_6;
+  llvmPackages = pkgs.llvmPackages_10;
 
   # Disable GHC 8.7.x core libraries.
   array = null;