--- src/sage/misc/package.py.orig	2014-11-23 15:58:13.000000000 +0100
+++ src/sage/misc/package.py	2015-01-22 20:32:25.651383902 +0100
@@ -204,7 +204,7 @@
     Otherwise, installing "pillow" will cause this function to think
     that "pil" is installed, for example.
     """
-    return any(p.split('-')[0] == package for p in installed_packages())
+    return True
 
 def package_versions(package_type, local=False):
     r"""