Gvim: missing font and overly large font

I’m trying to setup my development server VM. Basically it’s a server plus minimal dev tools that I access using ssh with X forwarding. So my packages so far only:

  environment.systemPackages = with pkgs; [
    vim_configurable
    hicolor-icon-theme
    git
  ];

but then the resulting gvim is ugly as hell. I probably need other packages, but what?