neovim: add pygments support

hosts/dionach.nix

@@ -118,7 +118,6 @@
     pcmanfm
     pstree # Show the set of running processes as a tree
     pwgen
-    python39Packages.pygments
     python3Full
     python39Packages.restview # ReStructuredText viewer
     python39Packages.sphinx # A tool that makes it easy to create intelligent and beautifulul documentation for Python projects

profiles/neovim.nix

@@ -2,6 +2,10 @@
   environment.variables = {EDITOR = "vim";};
 
   environment.systemPackages = with pkgs; [
+    # Add python packages required by NeoVim in NixOS
+    (python3.withPackages (ps: [
+      ps.pygments
+    ]))
     (neovim.override {
       vimAlias = true;
       configure = {
@@ -32,6 +36,7 @@
           ];
           opt = [];
         };
+        # Write a custom Neovim config for NixOS
         customRC = ''
           " Preferred global default settings:
           set nocompatible