diff --git a/pkgs/development/compilers/ghc/9.0.1.nix b/pkgs/development/compilers/ghc/9.0.1.nix
index bdb1a7555c21..54b256c28c1d 100644
--- a/pkgs/development/compilers/ghc/9.0.1.nix
+++ b/pkgs/development/compilers/ghc/9.0.1.nix
@@ -95,12 +95,12 @@ let
 
 in
 stdenv.mkDerivation (rec {
-  version = "9.0.0.20200925";
+  version = "9.0.0.20201227";
   name = "${targetPrefix}ghc-${version}";
 
   src = fetchurl {
-    url = "https://downloads.haskell.org/ghc/9.0.1-alpha1/ghc-${version}-src.tar.xz";
-    sha256 = "1c6vgic0bx0c4c6gszq7znvc5gxf0lgh630283mivbs1lyiqj88l";
+    url = "https://downloads.haskell.org/ghc/9.0.1-rc1/ghc-${version}-src.tar.xz";
+    sha256 = "1kg227fzg9qq2p7r8xqr99vvnx7ind4clxkydikyzf3vqvaacjfy";
   };
 
   enableParallelBuilding = true;