Patch #1459476: install PKG-INFO metadata alongside distutils-installed packages.
diff --git a/Lib/distutils/command/install.py b/Lib/distutils/command/install.py
index 7723761..453151d 100644
--- a/Lib/distutils/command/install.py
+++ b/Lib/distutils/command/install.py
@@ -601,6 +601,7 @@
                     ('install_headers', has_headers),
                     ('install_scripts', has_scripts),
                     ('install_data',    has_data),
+                    ('install_egg_info', lambda self:True),
                    ]
 
 # class install