diff --git a/pkgs/development/libraries/opencv/4.x.nix b/pkgs/development/libraries/opencv/4.x.nix
index a723ded6bb6..c6547f118d0 100644
--- a/pkgs/development/libraries/opencv/4.x.nix
+++ b/pkgs/development/libraries/opencv/4.x.nix
@@ -162,15 +162,11 @@ stdenv.mkDerivation {
 
   # This prevents cmake from using libraries in impure paths (which
   # causes build failure on non NixOS)
-  # Also, work around https://github.com/NixOS/nixpkgs/issues/26304 with
-  # what appears to be some stray headers in dnn/misc/tensorflow
-  # in contrib when generating the Python bindings:
   patches = [
     ./cmake-don-t-use-OpenCVFindOpenEXR.patch
   ] ++ lib.optional enableCuda ./cuda_opt_flow.patch;
   postPatch = ''
     sed -i '/Add these standard paths to the search paths for FIND_LIBRARY/,/^\s*$/{d}' CMakeLists.txt
-    sed -i -e 's|if len(decls) == 0:|if len(decls) == 0 or "opencv2/" not in hdr:|' ./modules/python/src2/gen2.py
   '';
 
   preConfigure =