anchor.diff:  
     patches = [
       ./fix_qt_5_11_build.patch
  +    (
  +      fetchpatch {
  +        # Fix missing app name and icon on Wayland.
  +        url = "https://github.com/LibreCAD/LibreCAD/commit/a17f8281093403f0c7c36996232665ed21906688.patch";
  +        sha256 = "1x46psh4bcx2hxck4l83ki43g1252vb033i2x94h4rpai9hww4d5";
  +      }
  +    )
     ];
   
     postPatch = ''
  
positive.code: { boost
  , fetchFromGitHub
  , installShellFiles
  , mkDerivationWith
  , muparser
  
negative.code:   stdenv = gcc8Stdenv;
  in
  
    # Doesn't build with gcc9
  mkDerivationWith stdenv.mkDerivation rec {
    pname = "librecad";
    version = "2.2.0-rc1";
  