diff --git a/pkgs/applications/audio/monkeys-audio/default.nix b/pkgs/applications/audio/monkeys-audio/default.nix
index b5553e0a6005..bb11921823ca 100644
--- a/pkgs/applications/audio/monkeys-audio/default.nix
+++ b/pkgs/applications/audio/monkeys-audio/default.nix
@@ -4,13 +4,13 @@
 , cmake
 }:
 
-stdenv.mkDerivation rec {
+stdenv.mkDerivation (finalAttrs: {
   version = "10.22";
   pname = "monkeys-audio";
 
   src = fetchzip {
     url = "https://monkeysaudio.com/files/MAC_${
-      builtins.concatStringsSep "" (lib.strings.splitString "." version)}_SDK.zip";
+      builtins.concatStringsSep "" (lib.strings.splitString "." finalAttrs.version)}_SDK.zip";
     sha256 = "sha256-JmDH9IudtuJdu1kSDI1RNaYiIgmPgH4RT2Myz9ihQH4=";
     stripRoot = false;
   };
@@ -21,10 +21,11 @@ stdenv.mkDerivation rec {
   meta = with lib; {
     description = "APE codec and decompressor";
     platforms = platforms.linux;
+    mainProgram = "mac";
     # This is not considered a GPL license, but it seems rather free although
     # it's not standard, see a quote of it:
     # https://github.com/NixOS/nixpkgs/pull/171682#issuecomment-1120260551
     license = licenses.free;
     maintainers = with maintainers; [ doronbehar ];
   };
-}
+})