diff --git a/pkgs/by-name/st/steam-unwrapped/package.nix b/pkgs/by-name/st/steam-unwrapped/package.nix
index c9c5e0cec510..f3a21165a181 100644
--- a/pkgs/by-name/st/steam-unwrapped/package.nix
+++ b/pkgs/by-name/st/steam-unwrapped/package.nix
@@ -23,8 +23,7 @@ stdenv.mkDerivation (finalAttrs: {
   ];
 
   makeFlags = [
-    "DESTDIR=$(out)"
-    "PREFIX="
+    "PREFIX=${placeholder "out"}"
   ];
 
   postInstall = ''