diff --git a/pkgs/by-name/sd/sdr-j-fm/package.nix b/pkgs/by-name/sd/sdr-j-fm/package.nix
index cc588fdff082..14c004121597 100644
--- a/pkgs/by-name/sd/sdr-j-fm/package.nix
+++ b/pkgs/by-name/sd/sdr-j-fm/package.nix
@@ -21,7 +21,7 @@
 
 stdenv.mkDerivation (finalAttrs: {
   pname = "sdr-j-fm";
-  version = "3.20-2025-10-07";
+  version = "3.20-unstable-2025-10-07";
 
   src = fetchFromGitHub {
     owner = "JvanKatwijk";