diff -up PyQt5-5.14.2/configure.py.qt5_sipdir PyQt5-5.14.2/configure.py
--- PyQt5-5.14.2/configure.py.qt5_sipdir	2020-04-02 09:58:06.029642000 -0500
+++ PyQt5-5.14.2/configure.py	2020-04-04 14:50:00.549639237 -0500
@@ -25,6 +25,7 @@ import os
 import shutil
 import stat
 import sys
+import sipconfig
 
 
 # Initialise the constants.
@@ -511,7 +512,7 @@ class TargetConfiguration:
         self.pyqt_bin_dir = py_config.bin_dir
         self.pyqt_module_dir = py_config.module_dir
         self.pyqt_stubs_dir = os.path.join(py_config.module_dir, 'PyQt5')
-        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
 
         # Remaining values.