anchor.diff:    buildFHSEnv = callPackage ./env.nix { };
   
     env = buildFHSEnv (removeAttrs args [
  -    "runScript" "extraInstallCommands" "meta" "passthru" "dieWithParent"
  +    "runScript" "extraInstallCommands" "meta" "passthru" "extraBwrapArgs" "dieWithParent"
       "unshareUser" "unshareCgroup" "unshareUts" "unshareNet" "unsharePid" "unshareIpc"
     ]);
   
  
positive.code: , extraInstallCommands ? ""
  , meta ? {}
  , passthru ? {}
  , unshareUser ? true
  , unshareIpc ? true
  , unsharePid ? true
  
negative.code:       "''${ro_mounts[@]}"
        "''${symlinks[@]}"
        "''${auto_mounts[@]}"
        ${concatStringsSep "\n  " extraBwrapArgs}
        ${init runScript}/bin/${name}-init ${initArgs}
      )
      exec "''${cmd[@]}"
  