diff --git a/pkgs/development/interpreters/python/cpython/default.nix b/pkgs/development/interpreters/python/cpython/default.nix
index bcfe2b8cd965..da585308a00f 100644
--- a/pkgs/development/interpreters/python/cpython/default.nix
+++ b/pkgs/development/interpreters/python/cpython/default.nix
@@ -240,6 +240,7 @@ in with passthru; stdenv.mkDerivation {
   ] ++ optionals (pythonAtLeast "3.9" && stdenv.isDarwin) [
     # Stop checking for TCL/TK in global macOS locations
     ./3.9/darwin-tcl-tk.patch
+  ] ++ optionals (isPy39 && stdenv.isDarwin) [
     # ctypes.util.find_library() now finds macOS 11+ system libraries when built on older macOS systems
     # https://github.com/python/cpython/pull/28053
     ./3.9/bpo-44689-ctypes.util.find_library-now-finds-macOS-1.patch