anchor.diff:    goPackagePath = "github.com/containerd/containerd";
     outputs = [ "out" "man" ];
   
  -  nativeBuildInputs = [ go-md2man utillinux ];
  +  nativeBuildInputs = [ go-md2man installShellFiles utillinux ];
   
     buildInputs = [ btrfs-progs ];
   
  
positive.code:     done
  
      make man
      manRoot="$man/share/man"
      mkdir -p "$manRoot"
      for manFile in man/*; do
        manName="$(basename "$manFile")" # "docker-build.1"
        number="$(echo $manName | rev | cut -d'.' -f1 | rev)"
        mkdir -p "$manRoot/man$number"
        gzip -c "$manFile" > "$manRoot/man$number/$manName.gz"
      done
    '';
  
    meta = {
  
negative.code: { lib, fetchFromGitHub, buildGoPackage, btrfs-progs, go-md2man, installShellFiles, utillinux }:
  
  with lib;
  
  