diff --git a/overlays/default.nix b/overlays/default.nix
index 6e89c94..511e611 100644
--- a/overlays/default.nix
+++ b/overlays/default.nix
@@ -1,7 +1,6 @@
 builtins.map (path: import path) [
   ./discord.nix
   ./material-icons.nix
-  ./nix.nix
   ./picom.nix
   ./rofi.nix
   ./xinit.nix
diff --git a/overlays/nix.nix b/overlays/nix.nix
deleted file mode 100644
index 2d5ee5d..0000000
--- a/overlays/nix.nix
+++ /dev/null
@@ -1,13 +0,0 @@
-# TODO: remove after upstream fixes https://github.com/NixOS/nix/issues/5728
-self: super: {
-  nixUnstable = super.nixUnstable.override rec {
-    version = "2.5${suffix}";
-    suffix = "pre20211007_${super.lib.substring 0 7 src.rev}";
-    src = super.fetchFromGitHub {
-      owner = "NixOS";
-      repo = "nix";
-      rev = "844dd901a7debe8b03ec93a7f717b6c4038dc572";
-      sha256 = "sha256-fe1B4lXkS6/UfpO0rJHwLC06zhOPrdSh4s9PmQ1JgPo=";
-    };
-  };
-}