anchor.diff: -{ lib, fetchFromGitHub, python3Packages, qtbase, fetchpatch, wrapQtAppsHook
  +{ lib, stdenv, fetchFromGitHub, python3Packages, qtbase, fetchpatch, wrapQtAppsHook
   , secp256k1 }:
   
   python3Packages.buildPythonApplication rec {
  
positive.code:       of the blockchain.
      '';
      homepage = "https://www.electroncash.org/";
      platforms = platforms.linux;
      maintainers = with maintainers; [ lassulus nyanloutre oxalica ];
      license = licenses.mit;
    };
  
negative.code:     pytest electroncash/tests
    '';
  
    postInstall = lib.optionalString stdenv.isLinux ''
      substituteInPlace $out/share/applications/electron-cash.desktop \
        --replace "Exec=electron-cash" "Exec=$out/bin/electron-cash"
    '';
  