anchor.diff: -{ stdenv, lib, fetchFromGitHub, qtbase, qtquickcontrols, cmake
  -, qttools, qtmultimedia
  +{ stdenv, lib, fetchFromGitHub, cmake
  +, qtbase, qtquickcontrols, qtkeychain, qtmultimedia, qttools
   , libqmatrixclient_0_4, libqmatrixclient_0_5 }:
   
   let
  
positive.code:   };
  
  in rec {
    quaternion     = generic "0.0.9.3"     "1hr9zqf301rg583n9jv256vzj7y57d8qgayk7c723bfknf1s6hh3" "v" libqmatrixclient_0_4;
    quaternion-git = generic "0.0.9.4-rc3" "1fc3ya9fr3zw1cx7565s2rswzry98avslrryvdi0qa9yn0m3sw7p" ""  libqmatrixclient_0_5;
  }
  
negative.code:       inherit sha256;
      };
  
      buildInputs = [ qtbase qtmultimedia qtquickcontrols qtkeychain qttools library ];
  
      nativeBuildInputs = [ cmake ];
  
  