diff --git a/pkgs/applications/misc/lenmus/default.nix b/pkgs/applications/misc/lenmus/default.nix
index 4ac0dc2eb944..b78a226b6145 100644
--- a/pkgs/applications/misc/lenmus/default.nix
+++ b/pkgs/applications/misc/lenmus/default.nix
@@ -16,10 +16,6 @@ stdenv.mkDerivation rec {
     sha256 = "1n639xr1qxx6rhqs0c6sjxp3bv8cwkmw1vfk1cji7514gj2a9v3p";
   };
 
-  cmakeFlags = [
-    "-DCMAKE_INSALL_PREFIX=$out"
-  ];
-
   enableParallelBuilding = true;
 
   patches = [