diff --git a/flake.nix b/flake.nix
index 0655ad2..d225697 100644
--- a/flake.nix
+++ b/flake.nix
@@ -11,7 +11,8 @@
       owner = "NessieCircuits";
       repo = "Riotee_SDK";
       tag = "v1.2.0";
-      hash = "sha256-1ZFvbGiTzAuBnKGUe/MAAI4D+d+jl/LCLcYqthkxB5M=";
+      fetchSubmodules = true;
+      hash = "sha256-oeJ+oYu2DiB39i1jMggqddPPssrd4QBthsUI6N82KOs=";
     };
 
     apps = system: pkgs: {