diff --git a/pkgs/development/tools/nwjs/default.nix b/pkgs/development/tools/nwjs/default.nix
index 91cc9b7634d4..5dfb16ded79e 100644
--- a/pkgs/development/tools/nwjs/default.nix
+++ b/pkgs/development/tools/nwjs/default.nix
@@ -37,7 +37,7 @@
 }:
 
 let
-  bits = if stdenv.hostPlatform.system == "x86_64-linux" then "x64" else "ia32";
+  bits = if stdenv.hostPlatform.is64bit then "x64" else "ia32";
 
   nwEnv = buildEnv {
     name = "nwjs-env";