diff --git a/mcu-contrib/default.nix b/mcu-contrib/default.nix
index 670345b..17ad9f6 100644
--- a/mcu-contrib/default.nix
+++ b/mcu-contrib/default.nix
@@ -75,10 +75,6 @@ in
         extraCargoBuildArgs = "--features pounder_v1_0";
       };
       lockin = {};
-      lockin-pounder_v1_0 = {
-        binaryName = "lockin";
-        extraCargoBuildArgs = "--features pounder_v1_0";
-      };
     } //
   {
     # openMMC build system breaks if host compiler is not available, so do not use stdenvNoCC here