diff --git a/nixos/flake-module.nix b/nixos/flake-module.nix
index 0328db0..dac0efd 100644
--- a/nixos/flake-module.nix
+++ b/nixos/flake-module.nix
@@ -13,6 +13,15 @@
           };
           options = "--delete-older-than 30d";
         };
+
+        settings = {
+          substituters = [
+            "https://devenv.cachix.org"
+          ];
+          trusted-public-keys = [
+            "devenv.cachix.org-1:w1cLUi8dv3hnoSPGAuibQv+f9TZLr6cv/Hm9XgU50cw="
+          ];
+        };
       };
 
       nixpkgs.config.allowUnfree = true;