config.nix

{
  packageOverrides = pkgs : with pkgs;{
    myXmlsec = pkgs.stdenv.lib.overrideDerivation pkgs.xmlsec (attrs: {
        buildInputs = attrs.buildInputs ++ [pkgs.openssl];
    });
    goEnv = pkgs.myEnvFun {
      name = "goEnv";
      shell = "${pkgs.zsh}/bin/zsh";

      buildInputs = [
        stdenv
        gcc
        pkgconfig
        glib
        libtool
        gnumake
        go
        libxml2
        libxslt
        openssl
        myXmlsec
        zlib
      ];
    };
  };
}