Fix powder toy build breaking and change source repository.

pkgs/games/the-powder-toy/default.nix

···
   version = "93.3";
 
   src = fetchFromGitHub {
-    owner = "simtr";
+    owner = "ThePowderToy";
     repo = "The-Powder-Toy";
     rev = "v${version}";
-    sha256 = "1n15kgl4qnz55b32ddgmhrv64cl3awbds8arycn7mkf7akwdg1g6";
+    sha256 = "1bg1y13kpqxx4mpncxvmg8w02dyqyd9hl43rwnys3sqrjdm9k02j";
   };
-
-  patches = [ ./fix-env.patch ];
-
-  postPatch = ''
-    sed -i 's,lua5.1,lua,g' SConscript
-  '';
 
   nativeBuildInputs = [ scons pkgconfig ];