diff --git a/build/compiletest.py b/build/compiletest.py
old mode 100644
new mode 100755
index 91df6c5e..fdbf7db1
--- a/build/compiletest.py
+++ b/build/compiletest.py
@@ -16,5 +16,8 @@ for filename in matches:
     try:
         compile(source, filename, 'exec')
     except Exception as e:
-        ctypes.windll.user32.MessageBoxA(0, traceback.format_exc(), "Exception in " + filename, 1)
-        sys.exit(1)
\ No newline at end of file
+        if 'win' in sys.platform:
+            ctypes.windll.user32.MessageBoxA(0, traceback.format_exc(), "Exception in " + filename, 1)
+        else:
+            print "Exception in %s: %s" % (filename, traceback.format_exc())
+        sys.exit(1)