Change ifdef/if defined to simple if's.
diff --git a/unix/main.c b/unix/main.c
index 2a1103c..eb120da 100644
--- a/unix/main.c
+++ b/unix/main.c
@@ -42,7 +42,7 @@
 
     py_lexer_free(lex);
 
-#if !defined(MICROPY_EMIT_ENABLE_CPYTHON)
+#if !MICROPY_EMIT_CPYTHON
     if (1) {
         // execute it
         py_obj_t module_fun = rt_make_function_from_id(1);
diff --git a/unix/mpyconfig.h b/unix/mpyconfig.h
index 117892b..d9e03f7 100644
--- a/unix/mpyconfig.h
+++ b/unix/mpyconfig.h
@@ -1,10 +1,10 @@
 // options to control how Micro Python is built
 
-//#define MICROPY_ENABLE_FLOAT
-#define MICROPY_EMIT_ENABLE_CPYTHON
-#define MICROPY_EMIT_ENABLE_X64
-//#define MICROPY_EMIT_ENABLE_THUMB
-#define MICROPY_EMIT_ENABLE_INLINE_THUMB
+#define MICROPY_ENABLE_FLOAT        (1)
+#define MICROPY_EMIT_CPYTHON        (1)
+#define MICROPY_EMIT_X64            (0)
+#define MICROPY_EMIT_THUMB          (0)
+#define MICROPY_EMIT_INLINE_THUMB   (0)
 
 // type definitions for the specific machine