diff --git a/overlay.nix b/overlay.nix
index cba7cc9..be0e29e 100644
--- a/overlay.nix
+++ b/overlay.nix
@@ -99,8 +99,6 @@ let
     );
 
     nix-doc = prev.callPackage ./nix-doc/package.nix { withPlugin = false; };
-
-    pegtl = prev.callPackage ./pegtl.nix { };
   };
 in
   # Make the overlay idempotent, since flakes passing nixos modules around by
diff --git a/pegtl.nix b/pegtl.nix
deleted file mode 100644
index 3fd999d..0000000
--- a/pegtl.nix
+++ /dev/null
@@ -1,23 +0,0 @@
-{
-  stdenv,
-  cmake,
-  ninja,
-  fetchFromGitHub,
-}:
-
-stdenv.mkDerivation {
-  pname = "pegtl";
-  version = "3.2.7";
-
-  src = fetchFromGitHub {
-    repo = "PEGTL";
-    owner = "taocpp";
-    rev = "refs/tags/3.2.7";
-    hash = "sha256-IV5YNGE4EWVrmg2Sia/rcU8jCuiBynQGJM6n3DCWTQU=";
-  };
-
-  nativeBuildInputs = [
-    cmake
-    ninja
-  ];
-}