diff --git a/Lib/site.py b/Lib/site.py
index 3238506..8ce44ef 100644
--- a/Lib/site.py
+++ b/Lib/site.py
@@ -341,6 +341,8 @@ def getsitepackages(prefixes=None):
             sitepackages.append(os.path.join(prefix, "lib",
                                         "python%d.%d" % sys.version_info[:2],
                                         "site-packages"))
+            # used in Debian
+            sitepackages.append(os.path.join(prefix, "lib", "python3", "dist-packages"))
         else:
             sitepackages.append(prefix)
             sitepackages.append(os.path.join(prefix, "lib", "site-packages"))