Add dependencies

clean-cache-remove.hook

@@ -6,4 +6,5 @@ Target = *
 [Action]
 Description = Cleaning package cache...
 When = PostTransaction
-Exec = /usr/bin/paccache -ruk0 
+Depends = pacman-contrib
+Exec = /usr/bin/paccache -ruk0

clean-cache-upgrade.hook

@@ -6,4 +6,5 @@ Target = *
 [Action]
 Description = Reducing package cache...
 When = PostTransaction
+Depends = pacman-contrib
 Exec = /usr/bin/paccache -rk2