diff --git a/src/flake.nix b/src/flake.nix
index e289a40..811fe85 100644
--- a/src/flake.nix
+++ b/src/flake.nix
@@ -22,14 +22,6 @@
           mypkgs = xbuild.packages.${system} // extralib.packages.${system} // librtti.packages.${system};
           overlays = [
             (final: prev: mypkgs // prev)
-            (final: prev: {
-              capnpc = prev.capnpc.overrideAttrs (oldAttrs: {
-                src = final.fetchurl {
-                  url = "https://ghfast.top/https://github.com/shen390s/c-capnproto/archive/e45ff682c4756ac5067cbac6d0f282a8ea5f0155.tar.gz";
-                  hash = "sha256-zsiX6unPF45eISP6sqbQImrivJuSE0BF4bTP/db+lQY=";
-                };
-              });
-            })
           ];
           pkgs = import nixpkgs { inherit overlays system;};
           xpkgs = import ./nixSupport/default.nix {