nix-bundle/nix-installer.nix

{ stdenv, fetchFromGitHub, writeText, nix, cacert }:

stdenv.mkDerivation {
  name = "nix-installer";

  propagatedBuildInputs = [ nix.out cacert ];

  buildCommand = ''
    mkdir -p $out/bin/
    substitute ${./install-nix-from-closure.sh} $out/install \
      --subst-var-by nix ${nix.out} \
      --subst-var-by cacert ${cacert}
    chmod +x $out/install
  '';
}