anchor.diff:  { stdenv, fetchFromGitLab, rustPlatform, cmake, pkgconfig, openssl
  -, darwin
  +, darwin, installShellFiles
   
   , x11Support ? stdenv.isLinux || stdenv.hostPlatform.isBSD
   , xclip ? null, xsel ? null
  
positive.code: 
    cargoSha256 = "1x4hxar60lwimldpsi0frdlssgsb72qahn3dmb980sj6cmbq3f0b";
  
    nativeBuildInputs = [ cmake pkgconfig ];
    buildInputs = [ openssl ]
    ++ stdenv.lib.optionals stdenv.isDarwin (with darwin.apple_sdk.frameworks; [ CoreFoundation CoreServices Security AppKit ])
    ;
  
negative.code:   );
  
    postInstall = ''
      installShellCompletion contrib/completions/ffsend.{bash,fish} --zsh contrib/completions/_ffsend
    '';
    # There's also .elv and .ps1 completion files but I don't know where to install those
  
  