diff --git a/NixOS.md b/NixOS.md
index 9c5411c..a0c4759 100644
--- a/NixOS.md
+++ b/NixOS.md
@@ -8,6 +8,7 @@ This document contains general notes about NixOS that are independent of my NixO
 * [NixOS](#nixos)
   * [Table of Contents](#table-of-contents)
   * [Misc](#misc)
+  * [Upgrade from 23.05 to 23.11](#upgrade-from-2305-to-2311)
   * [niv: Dependency management](#niv-dependency-management)
     * [Add Home Manager with niv](#add-home-manager-with-niv)
     * [Add NUR with niv](#add-nur-with-niv)
@@ -57,6 +58,15 @@ niv update && colmena build --on yodaTux -v --show-trace && colmena apply-local
 
 TODO: Update yodaHedgehog and yodaYoga with `boot` (!)
 
+Update channel (for `nix-shell` usage in a terminal):
+
+```shell
+sudo nix-channel --list
+#=> nixos https://nixos.org/channels/nixos-23.05
+sudo nix-channel --add https://nixos.org/channels/nixos-23.11 nixos
+sudo nix-channel --update
+```
+
 ## niv: Dependency management
 
 * https://nix.dev/tutorials/first-steps/towards-reproducibility-pinning-nixpkgs#dependency-management-with-niv