diff --git a/src/lustre_dev_tools_ffi.erl b/src/lustre_dev_tools_ffi.erl
index 658a7c4..a09e16a 100644
--- a/src/lustre_dev_tools_ffi.erl
+++ b/src/lustre_dev_tools_ffi.erl
@@ -23,8 +23,8 @@ get_cpu() ->
             list_to_binary(Arch);
         {win32, _} ->
             case erlang:system_info(wordsize) of
-                4 -> {ok, <<"ia32">>};
-                8 -> {ok, <<"x64">>}
+                4 -> <<"ia32">>;
+                8 -> <<"x64">>
             end
     end.
 
@@ -49,9 +49,15 @@ get_tailwind(Url) ->
     end.
 
 unzip_esbuild(Zip) ->
+    Filepath =
+        case os:type() of 
+            {win32, _} -> "package/esbuild.exe";
+            _ -> "package/bin/esbuild"
+        end,
+
     Result =
         erl_tar:extract({binary, Zip}, [
-            memory, compressed, {files, ["package/bin/esbuild"]}
+            memory, compressed, {files, [Filepath]}
         ]),
 
     case Result of