anchor.diff: -{ stdenv, lib, fetchurl, ncurses }:
  +{ stdenv, lib, fetchurl, fetchpatch, ncurses }:
   
   stdenv.mkDerivation rec {
     pname = "smemstat";
  
positive.code:   '';
    meta = with lib; {
      description = "Memory usage monitoring tool";
      homepage = "https://kernel.ubuntu.com/~cking/smemstat/";
      license = licenses.gpl2;
      platforms = platforms.linux;
      maintainers = with maintainers; [ womfoo ];
  
negative.code:     url = "https://kernel.ubuntu.com/~cking/tarballs/smemstat/smemstat-${version}.tar.xz";
      sha256 = "sha256-Vrs1jOg5yHdEffVo769aaxSawo4iZtGrFJ65Nu+RhcU=";
    };
    patches = [
      # Pull patch pending upstream inclusion to support ncurses-6.3:
      #  https://github.com/ColinIanKing/smemstat/pull/1
      (fetchpatch {
        name = "ncurses-6.3.patch";
        url = "https://github.com/ColinIanKing/smemstat/commit/95119558d1679295c9f9f7f618ddbe212674a4bf.patch";
        sha256 = "sha256-Cl3Y0HIy1nXqBux6+AXoPuKJatSv3Z0X/4bD+MNjkAQ=";
      })
    ];
    buildInputs = [ ncurses ];
    installFlags = [ "DESTDIR=$(out)" ];
    postInstall = ''
  