diff --git a/flake.nix b/flake.nix
index c5c97f49..c82b6035 100644
--- a/flake.nix
+++ b/flake.nix
@@ -28,6 +28,8 @@
 
   nixConfig = {
     keepOutputs = true;
+    extra-substituters = ["https://attic.radicle.xyz/radicle"];
+    extra-trusted-public-keys = ["radicle:TruHbueGHPm9iYSq7Gq6wJApJOqddWH+CEo+fsZnf4g="];
   };
 
   outputs = {