diff --git a/profiles/host_common.nix b/profiles/host_common.nix
index 9175978..84d052c 100644
--- a/profiles/host_common.nix
+++ b/profiles/host_common.nix
@@ -63,7 +63,8 @@
     };
     autoOptimiseStore = true;
     extraOptions = ''
-      show-trace = true   # Enable --show-trace by default for nix
+      show-trace = true                 # Enable --show-trace by default for nix
+      builders-use-substitutes = true   # Set builders to use caches
     '';
     trustedUsers = ["craige"];
   };