diff --git a/setupbase.py b/setupbase.py
index ec723a19b..87b2a0bfc 100644
--- a/setupbase.py
+++ b/setupbase.py
@@ -116,7 +116,6 @@ def find_packages():
     add_package(packages, 'external.Itpl')
     add_package(packages, 'external.mglob')
     add_package(packages, 'external.path')
-    add_package(packages, 'external.pretty')
     add_package(packages, 'external.pyparsing')
     add_package(packages, 'external.simplegeneric')
     add_package(packages, 'external.validate')