diff --git a/config/BuildSystem/config/packages/petsc4py.py b/config/BuildSystem/config/packages/petsc4py.py
index 4a58243..831aa04 100644
--- a/config/BuildSystem/config/packages/petsc4py.py
+++ b/config/BuildSystem/config/packages/petsc4py.py
@@ -37,7 +37,7 @@ class Configure(config.package.Package):
 
   def Install(self):
     import os
-    installLibPath = os.path.join(self.installDir, 'lib')
+    installLibPath = os.path.join(self.installDir, '@PYTHON_SITEPACKAGES@')
     if self.setCompilers.isDarwin(self.log):
       apple = 'You may need to\n (csh/tcsh) setenv MACOSX_DEPLOYMENT_TARGET 10.X\n (sh/bash) MACOSX_DEPLOYMENT_TARGET=10.X; export MACOSX_DEPLOYMENT_TARGET\nbefore running make on PETSc'
     else:
@@ -70,7 +70,7 @@ class Configure(config.package.Package):
       newdir += 'NUMPY_INCLUDE="'+numpy_include+'" '
 
     self.addDefine('HAVE_PETSC4PY',1)
-    self.addDefine('PETSC4PY_INSTALL_PATH','"'+os.path.join(self.installdir.dir,'lib')+'"')
+    self.addDefine('PETSC4PY_INSTALL_PATH','"'+installLibPath+'"')
     self.addMakeMacro('PETSC4PY','yes')
     self.addMakeRule('petsc4pybuild','', \
                        ['@echo "*** Building petsc4py ***"',\