--- a/quex/DEFINITIONS.py	2017-12-13 21:48:52.887765325 +0100
+++ b/quex/DEFINITIONS.py	2017-12-13 21:52:29.805877359 +0100
@@ -57,7 +57,7 @@
     global QUEX_INSTALLATION_DIR
 
     # -- Try to acces the file 'quex-exe.py' in order to verify
-    if os.access(QUEX_INSTALLATION_DIR + "/quex-exe.py", os.F_OK) == False:
+    if False:
         print("error: Environment variable 'QUEX_PATH' does not point to")
         print("error: a valid installation directory of quex.")
         print("error: current setting of 'QUEX_PATH':")