diff --git a/flake.nix b/flake.nix
index c5da70d076..d8ed2e4bbb 100644
--- a/flake.nix
+++ b/flake.nix
@@ -27,4 +27,10 @@
         "'nix-ros-overlay.nixosModule' is deprecated, use 'nix-ros-overlay.nixosModules.default' instead"
         self.nixosModules.default;
     };
+
+  nixConfig = {
+    extra-substituters = [ "https://ros.cachix.org" ];
+    extra-trusted-public-keys = [ "ros.cachix.org-1:dSyZxI8geDCJrwgvCOHDoAfOm5sV1wCPjBkKL+38Rvo=" ];
+  };
+
 }