diff --git a/systems/x86_64-linux/carbon/default.nix b/systems/x86_64-linux/carbon/default.nix
index 9c5fceb..5bc9733 100644
--- a/systems/x86_64-linux/carbon/default.nix
+++ b/systems/x86_64-linux/carbon/default.nix
@@ -8,6 +8,7 @@
 
   aa = {
     nix.enable = true;
+    nix.useSelfhostedCache = true;
 
     archetypes.workstation.enable = true;