anchor.diff:      install -Dm755 bin/skopeo -t $out/bin
       installManPage docs/*.[1-9]
       installShellCompletion --bash completions/bash/skopeo
  -  '' + stdenv.lib.optionalString stdenv.isLinux ''
  +  '' + lib.optionalString stdenv.isLinux ''
       wrapProgram $out/bin/skopeo \
  -      --prefix PATH : ${stdenv.lib.makeBinPath [ fuse-overlayfs ]}
  +      --prefix PATH : ${lib.makeBinPath [ fuse-overlayfs ]}
     '';
   
     meta = with lib; {
  
positive.code:   nativeBuildInputs = [ pkg-config go-md2man installShellFiles makeWrapper ];
  
    buildInputs = [ gpgme ]
    ++ stdenv.lib.optionals stdenv.isLinux [ lvm2 btrfs-progs ];
  
    buildPhase = ''
      patchShebangs .
  
negative.code: 
  buildGoModule rec {
    pname = "skopeo";
    version = "1.2.1";
  
    src = fetchFromGitHub {
      rev = "v${version}";
      owner = "containers";
      repo = "skopeo";
      sha256 = "1y9pmijazbgxzriymrm7zrifmkd1x1wad9b3zjcj7zwr6c999dhg";
    };
  
    outputs = [ "out" "man" ];
  