Put latex into seperate package set.

pkgsets/latex.nix

@@ -0,0 +1,10 @@
+{ config, lib, pkgs, ... }:
+
+with lib;
+
+{
+  config.machine.pkgsets.latex.pkgs = with pkgs; [
+    texlive.combined.scheme-full
+    texlab
+  ];
+}