diff --git a/default.nix b/default.nix
index 0aa0192..2e7b01f 100644
--- a/default.nix
+++ b/default.nix
@@ -10,7 +10,7 @@ let
   basepkgs = import nixpkgs { inherit system; };
   pkgs = if static then basepkgs.pkgsStatic else basepkgs.pkgs;
 
-  ghc =  if static then pkgs.haskell.packages.integer-simple.ghc8104
+  ghc = if static then pkgs.haskell.packages.integer-simple.ghc901
     else if compiler == "default" then pkgs.haskellPackages
     else pkgs.haskell.packages.${compiler};