diff --git a/flake.nix b/flake.nix
index 16c8887..337589b 100644
--- a/flake.nix
+++ b/flake.nix
@@ -18,7 +18,7 @@
       stdenv.mkDerivation {
         pname = "sTodo";
         version = "1.0.0";
-
+        src = tarball;
         buildInputs = [zlib gmp libffi openssl];
         installPhase = ''
           mkdir -p $out/bin