diff --git a/.config/bash/module/Export.sh b/.config/bash/module/Export.sh
index b5c1fd2..6c07192 100644
--- a/.config/bash/module/Export.sh
+++ b/.config/bash/module/Export.sh
@@ -24,9 +24,6 @@ export TEXMFLOCAL="${HOME}/app/tex/data/local"
 # Dotfiles exports.
 export BASH_MODULE_PATH="${HOME}/.config/bash/module"
 
-# Nix config.
-export NIX_PATH="nixpkgs=/nix/var/nix/profiles/per-user/root/channels/nixos:nixos-config=/root/.config/linux/nix/${HOSTNAME}/Configuration.nix:/nix/var/nix/profiles/per-user/root/channels"
-
 # Set java version. Sets to latest when not specified.
 # Usage: export_java <VERSION>
 function export_java() {
diff --git a/.config/bash/module/Nix.sh b/.config/bash/module/Nix.sh
index ec975e7..86306fe 100644
--- a/.config/bash/module/Nix.sh
+++ b/.config/bash/module/Nix.sh
@@ -35,12 +35,12 @@ function nix_channel() {
 
 # Update system (rebuild).
 function nix_update() {
-	nixos-rebuild switch
+	nixos-rebuild switch -I nixos-config=/root/.config/linux/nix/${HOSTNAME}/Configuration.nix
 }
 
 # Upgrade system.
 function nix_upgrade() {
-	nixos-rebuild switch --upgrade
+	nixos-rebuild switch --upgrade -I nixos-config=/root/.config/linux/nix/${HOSTNAME}/Configuration.nix
 }
 
 # Free up root space.