diff --git a/outputs.nix b/outputs.nix
index 4b5c419..427c178 100644
--- a/outputs.nix
+++ b/outputs.nix
@@ -78,30 +78,6 @@ self = {
       builtins.attrValues
       builtins.listToAttrs
     ];
-  # FIXME: currently impure
-  # NOTE: to run, you need to evaluate outputs.nix instead of default.nix
-  #       nix-shell outputs.nix -A update
-  update = let
-    updateScript = (self.packagesForSystem (builtins.currentSystem)).den-update-script;
-  in updateScript {
-    path = "";
-    packages = lib.pipe ./update-list.nix [
-      import
-      (x: x self)
-      lib.attrsToList
-      (lib.imap1 (i: {name, value}: {
-        name = builtins.toString i;
-        value = value // {
-          # hack to pass isDerivation check in nixpkgs maintainers/scripts/update.nix
-          # https://github.com/NixOS/nixpkgs/blob/a1185f4064c18a5db37c5c84e5638c78b46e3341/maintainers/scripts/update.nix#L85
-          type = "derivation";
-          name = name;
-        };
-      }))
-      builtins.listToAttrs
-      lib.recurseIntoAttrs
-    ];
-  };
 };
 
 in self
diff --git a/update-list.nix b/update-list.nix
deleted file mode 100644
index 9ce74c3..0000000
--- a/update-list.nix
+++ /dev/null
@@ -1,13 +0,0 @@
-self:
-
-# MARK: inputs
-( let
-  inputsWithPackages = import self.inputsPath {
-    pkgs = self.packagesForSystem builtins.currentSystem;
-  };
-in {
-  "inputs/nixpkgs" = inputsWithPackages.nixpkgs;
-  "inputs/nixpkgs-unstable" = inputsWithPackages.nixpkgs-unstable;
-  "inputs/cosmic-modules" = inputsWithPackages.cosmic-modules;
-  "inputs/nixos-vscode-server" = inputsWithPackages.nixos-vscode-server;
-})