diff -rupN PyQt-gpl-5.4.1/configure.py PyQt-gpl-5.4.1-new/configure.py
--- PyQt-gpl-5.4.1/configure.py	2015-02-26 13:17:00.000000000 +0100
+++ PyQt-gpl-5.4.1-new/configure.py	2015-06-05 00:12:06.326506542 +0200
@@ -25,6 +25,7 @@ import os
 import shutil
 import stat
 import sys
+import sipconfig
 
 
 # Initialise the constants.
@@ -463,7 +464,7 @@ class TargetConfiguration:
         self.py_version = py_config.version
         self.pyqt_bin_dir = py_config.bin_dir
         self.pyqt_module_dir = py_config.module_dir
-        self.pyqt_sip_dir = os.path.join(py_config.data_dir, 'sip', 'PyQt5')
+        self.pyqt_sip_dir = os.path.join(sipconfig.Configuration().default_sip_dir, 'PyQt5')
         self.pyuic_interpreter = py_config.pyuic_interpreter
 
         # The qmake spec we want to use.