diff --git a/overlays/0-previews.nix b/overlays/0-previews.nix
index b20ec730..dc555632 100644
--- a/overlays/0-previews.nix
+++ b/overlays/0-previews.nix
@@ -9,5 +9,8 @@ in preview "20.09pre-git" (unstable: {
   gnome3 = super.gnome3 // {
     inherit (unstable.gnome3) gnome-keyring seahorse gdm;
   };
-  inherit (unstable) neovim vimPlugins syncthing nerdfonts;
+  haskellPackages = super.haskellPackages // {
+    inherit (unstable.haskellPackages) ormolu releaser;
+  };
+  inherit (unstable) neovim vimPlugins syncthing nerdfonts; # riot-desktop;
 })
diff --git a/pkgs/default.nix b/pkgs/default.nix
index 3d34fba8..3b1d03c6 100644
--- a/pkgs/default.nix
+++ b/pkgs/default.nix
@@ -39,10 +39,10 @@ in rec {
   };
   home-pkgs = {
     inherit (pkgs.pythonPackages) yapf jsbeautifier;
-    inherit (pkgs.haskellPackages) brittany;
+    inherit (pkgs.haskellPackages) brittany ormolu releaser;
     inherit (pkgs)
       go gdb mpc_cli ncmpcpp shfmt htmlTidy astyle nodejs tasksh magic-wormhole
-      nixfmt stack ghcid rnix-lsp tmate rustup kitty ghc;
+      nixfmt stack ghcid rnix-lsp tmate rustup kitty ghc cabal-install;
     inherit obelisk;
   };
   accounting-pkgs = {