bdukes/nugetpackages — pull request #1 by zippy1981 (2013-05-11 14:34:15+00:00)
Title: Supress file overwrite messages for reinstallation

Taken from here: http://www.jrsoftware.org/ishelp/

BTW perhaps the meta package should only be tied to 6.8.5.* so you don't need to update it for dot releases.