diff --git a/pkgs/development/tools/knightos/mkrom/default.nix b/pkgs/development/tools/knightos/mkrom/default.nix
index af40a1a95ef6..21caa5b8b32a 100644
--- a/pkgs/development/tools/knightos/mkrom/default.nix
+++ b/pkgs/development/tools/knightos/mkrom/default.nix
@@ -23,6 +23,5 @@ stdenv.mkDerivation rec {
     license     = licenses.mit;
     maintainers = with maintainers; [ siraben ];
     platforms   = platforms.all;
-    mainProgram = "remkrom";
   };
 }
diff --git a/pkgs/development/tools/knightos/remkrom/default.nix b/pkgs/development/tools/knightos/remkrom/default.nix
index 837006d1bf8d..bfc01c469b59 100644
--- a/pkgs/development/tools/knightos/remkrom/default.nix
+++ b/pkgs/development/tools/knightos/remkrom/default.nix
@@ -18,5 +18,6 @@ rustPlatform.buildRustPackage {
     homepage = "https://github.com/siraben/remkrom";
     license = licenses.mit;
     maintainers = with maintainers; [ siraben ];
+    mainProgram = "remkrom";
   };
 }