Merge pull request #123506 from stephank/fix-spacenav-cube-example-darwin

spacenav-cube-example: fix darwin build

pkgs/applications/misc/spacenav-cube-example/default.nix

···
 
   buildInputs = [ libX11 mesa_glu libspnav ];
 
-  configureFlags = [ "--disable-debug" ];
+  makeFlags = [ "CC=${stdenv.cc.targetPrefix}cc" ];
 
   installPhase = ''
     runHook preInstall

pkgs/development/libraries/libspnav/default.nix

···
-{ stdenv, lib, fetchFromGitHub, libX11}:
+{ stdenv, lib, fetchFromGitHub, libX11, fixDarwinDylibNames }:
 
 stdenv.mkDerivation rec {
   version = "0.2.3";
···
     sha256 = "098h1jhlj87axpza5zgy58prp0zn94wyrbch6x0s7q4mzh7dc8ba";
   };
 
+  nativeBuildInputs = lib.optional stdenv.isDarwin fixDarwinDylibNames;
   buildInputs = [ libX11 ];
 
   configureFlags = [ "--disable-debug"];