diff --git a/pkgs/shells/rc-9front/default.nix b/pkgs/shells/rc-9front/default.nix
index a7d2f1e54e3e..ff265dbec871 100644
--- a/pkgs/shells/rc-9front/default.nix
+++ b/pkgs/shells/rc-9front/default.nix
@@ -8,7 +8,7 @@
 
 stdenv.mkDerivation {
   pname = "rc-9front";
-  version = "unstable-2022-11-01";
+  version = "0-unstable-2022-11-01";
 
   src = fetchFrom9Front {
     domain = "shithub.us";