diff --git a/pisi/config.py b/pisi/config.py
index 324ece9a..9e321a27 100644
--- a/pisi/config.py
+++ b/pisi/config.py
@@ -34,6 +34,9 @@ class Config(object):
         def tmp_dir(self):
             return self.destdir + const.tmp_dir_suffix
 
+        def install_dir(self):
+            return self.tmp_dir() + const.install_dir_suffix
+
     __configinstance = configimpl()
 
     def __init__(self):