Disable shellcheck

It's broken at the moment: https://hydra.nixos.org/build/105746055

Also it pulls in GHC which is a pretty big dependency.

release.nix

@@ -128,7 +128,7 @@ let
       in
 
       runCommand "nix-binary-tarball-${version}"
-        { nativeBuildInputs = lib.optional (system != "aarch64-linux") shellcheck;
+        { #nativeBuildInputs = lib.optional (system != "aarch64-linux") shellcheck;
           meta.description = "Distribution-independent Nix bootstrap binaries for ${system}";
         }
         ''