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: 
  buildGoModule rec {
    pname = "skopeo";
    version = "1.2.0";
  
    src = fetchFromGitHub {
      rev = "v${version}";
      owner = "containers";
      repo = "skopeo";
      sha256 = "1v7k3ki10i6082r7zswblyirx6zck674y6bw3plssw4p1l2611rd";
    };
  
    outputs = [ "out" "man" ];
  
negative.code: { lib
  , stdenv
  , buildGoModule
  , fetchFromGitHub
  , gpgme
  