diff --git a/.config/bash/module/Nix.sh b/.config/bash/module/Nix.sh
index f089b68..699c11e 100644
--- a/.config/bash/module/Nix.sh
+++ b/.config/bash/module/Nix.sh
@@ -37,3 +37,9 @@ function nix_update() {
 function nix_upgrade() {
 	nixos-rebuild switch --upgrade
 }
+
+# Free up root space.
+function nix_clean() {
+	nix-collect-garbage -d
+	[[ "${UID}" = 0 ]] && nix-store --gc
+}