Remove unnecessary default.nix suffix

configuration/default.nix

@@ -4,11 +4,10 @@ let
 			(self: super: {
 				/* NOTE: Namespaced under `pkgs.cryto.*` to prevent naming conflicts with upstream nixpkgs */
 				cryto = {
-					# FIXME: Remove default.nix suffix?
 					fetchFromCrytoGit = self.callPackage ./lib/fetch/from-cryto-git.nix {};
 					nodeApplication = self.callPackage ./lib/node-application.nix {};
 					unpack = self.callPackage ./lib/unpack.nix {};
-					mobileProxy = self.callPackage ./packages/mobile-proxy/default.nix { configFile = null; };
+					mobileProxy = self.callPackage ./packages/mobile-proxy { configFile = null; };
 				};
 			})
 		];