{ ... }:

final: prev: {
  synergy = prev.synergy.overrideAttrs (oldAttrs: {
    postPatch = (oldAttrs.postPatch or "") + ''
      # Fix deprecated Qt endl usage in QTextStream contexts only
      # Don't touch cerr/cout which use std::endl
      find . -name "*.cpp" -type f -exec sed -i \
        's/\(outStream.*<<.*\)endl/\1Qt::endl/g; s/\(QTextStream.*<<.*\)endl/\1Qt::endl/g' {} +
      find . -name "*.h" -type f -exec sed -i \
        's/\(outStream.*<<.*\)endl/\1Qt::endl/g; s/\(QTextStream.*<<.*\)endl/\1Qt::endl/g' {} +
      
      # Fix missing SIZE_MAX include
      sed -i '/#include <cstring>/a#include <cstdint>' src/lib/server/InputFilter.cpp
    '';
  });
}