diff --git a/pkgs/applications/misc/gnuradio/rds.nix b/pkgs/applications/misc/gnuradio/rds.nix
index b617791dc2e..5d9670ba307 100644
--- a/pkgs/applications/misc/gnuradio/rds.nix
+++ b/pkgs/applications/misc/gnuradio/rds.nix
@@ -11,7 +11,7 @@ stdenv.mkDerivation rec {
   src = fetchFromGitHub {
     owner = "bastibl";
     repo = "gr-rds";
-    rev = "$v{version}";
+    rev = "v${version}";
     sha256 = "008284ya464q4h4fd0zvcn6g7bym231p8fl3kdxncz9ks4zsbsxs";
   };