diff --git a/pkgs/development/libraries/science/math/rubiks/default.nix b/pkgs/development/libraries/science/math/rubiks/default.nix
index 5b20948686b..fe448106b15 100644
--- a/pkgs/development/libraries/science/math/rubiks/default.nix
+++ b/pkgs/development/libraries/science/math/rubiks/default.nix
@@ -22,7 +22,7 @@ stdenv.mkDerivation rec {
   buildPhase = "true";
 
   installFlags = [
-    "PREFIX=$out"
+    "PREFIX=$(out)"
   ];
 
   patches = [