Dummy setcap(8)

setcap-noop.nix

  # Various package modifications to work around bugs or lack of
  # features in lx-brand.  Ideally I will upstream proper fixes for
  # all of these.
  nixpkgs.config.packageOverrides = pkgs: rec {
    # No capability support, so we override the libcap package to
    # provide a dummy setcap(8)
    libcap = let
      setcap-noop = pkgs.writeTextFile {
        name = "setcap-noop";
        text = ''
          #!/bin/sh

          echo "WARNING: Treating setcap(8) as a no-op on lx-brand" >/dev/stderr
        '';
      };
    in pkgs.libcap.overrideAttrs (oldAttrs: {
      postFixup = ''
        mv "$out"/bin/setcap "$out"/bin/setcap.DISABLED
        cp ${setcap-noop} "$out"/bin/setcap
        chmod a+x "$out"/bin/setcap
      '';
    });
  };