anchor.diff:  
     meta = with lib; {
       description = "Markdown notes editor and manager designed for elementary OS"
  -    + lib.optionalString withPantheon " - built with Contractor support";
  +      + lib.optionalString withPantheon " - built with Contractor support";
       homepage = "https://github.com/Philip-Scott/Notes-up";
  -    license = licenses.gpl2;
  +    license = licenses.gpl2Only;
       maintainers = with maintainers; [ davidak ];
       platforms = platforms.linux;
     };
  
positive.code:     gtkspell3
      libgee
      pantheon.granite
      sqlite
      webkitgtk
    ];
  
negative.code: , gtkspell3
  , glib
  , libgee
  , pcre
  , sqlite
  , discount
  , wrapGAppsHook
  , withPantheon ? false
  }:
  
  stdenv.mkDerivation rec {
    pname = "notes-up";
    version = "unstable-2020-12-29";
  
    src = fetchFromGitHub {
      owner = "Philip-Scott";
      repo = "Notes-up";
      rev = "2ea9f35f588769758f5d2d4436d71c4059141a6f";
      sha256 = "sha256-lKOM9+s34xYB9bF9pgip9DFu+6AaxSE4HjFVhoWtttk=";
    };
  
    nativeBuildInputs = [
      cmake
      ninja
      vala
      pkg-config
      wrapGAppsHook
    ];
  