[[!comment format=mdwn
 username="joey"
 subject="""comment 3"""
 date="2015-03-30T23:26:38Z"
 content="""
As to a mixed unstable/experimental machine, such a machine has a Property
of having somepackage installed from experimental. One way to represent
that is by defining a property:

installedFromExperimental :: [Package] -> Property NoInfo  
installedFromExperimental = Apt.installed' ["-y", "-texperimental"]  

"""]]
