Can't install any convex hull packages under 0.6.4

I have tried to install both ConvexHull.jl and QHull.jl for convex hull computations under Julia 0.6.4 running on Windows 10 and they both fail to install:

julia> Pkg.add("ConvexHull")
ERROR: unknown package ConvexHull
macro expansion at .\pkg\entry.jl:53 [inlined]
(::Base.Pkg.Entry.##1#3{String,Base.Pkg.Types.VersionSet})() at .\task.jl:335
Stacktrace:
 [1] sync_end() at .\task.jl:287
 [2] macro expansion at .\task.jl:303 [inlined]
 [3] add(::String, ::Base.Pkg.Types.VersionSet) at .\pkg\entry.jl:51
 [4] (::Base.Pkg.Dir.##4#7{Array{Any,1},Base.Pkg.Entry.#add,Tuple{String}})() at .\pkg\dir.jl:36
 [5] cd(::Base.Pkg.Dir.##4#7{Array{Any,1},Base.Pkg.Entry.#add,Tuple{String}}, ::String) at .\file.jl:59
 [6] #cd#1(::Array{Any,1}, ::Function, ::Function, ::String, ::Vararg{String,N} where N) at .\pkg\dir.jl:36
 [7] add(::String) at .\pkg\pkg.jl:117

I opened a new issue for both packages but in the meanwhile I thought I would check here too… Any ideas?

-Arrigo

https://github.com/JuliaPolyhedra/ConvexHull.jl/issues/11#issuecomment-429418512