diff --git a/flake.nix b/flake.nix
index 61ac810..3c97a70 100644
--- a/flake.nix
+++ b/flake.nix
@@ -155,6 +155,13 @@
                     allowed-users = [ "root" myUsername "@nixbld" ];
 
                     auto-optimise-store = true; # https://daiderd.com/nix-darwin/manual/index.html#opt-nix.settings.auto-optimise-store
+
+                    substituters = [
+                      "https://nix-community.cachix.org"
+                    ];
+                    trusted-public-keys = [
+                      "nix-community.cachix.org-1:mB9FSh9qf2dCimDSUo8Zy7bkq5CX+/rkCWyvRCYg3Fs="
+                    ];
                   };
 
                   extraOptions = ''
@@ -538,4 +545,12 @@
           };
         }
       );
+  nixConfig = {
+    extra-substituters = [
+      "https://nix-community.cachix.org"
+    ];
+    extra-trusted-public-keys = [
+      "nix-community.cachix.org-1:mB9FSh9qf2dCimDSUo8Zy7bkq5CX+/rkCWyvRCYg3Fs="
+    ];
+  };
 }