Pkg on libgit2 doesn't support filesystem URLs?

I did just update on my v0.5 package directory (i also run 0.4 and 0.6dev in parallel) and got reported this (at the end of Pkg.update):

INFO: Updating Cairo master...
INFO: Updating MachO master...
INFO: Updating DWARF master...
INFO: Updating TerminalUI master...
INFO: Updating Gtk master...
INFO: Computing changes...
INFO: No packages to install, update or remove
ERROR: Update finished with errors.
=> Package Iplot cannot be updated.
GitError(Code:ERROR, Class:Net, Unsupported URL protocol)
 in macro expansion at ./libgit2/error.jl:99 [inlined]
 in #fetch#52(::Base.LibGit2.FetchOptions, ::String, ::Function, ::Base.LibGit2.GitRemote, ::Array{AbstractString,1}) at ./libgit2/remote.jl:70
 in (::Base.LibGit2.#kw##fetch)(::Array{Any,1}, ::Base.LibGit2.#fetch, ::Base.LibGit2.GitRemote, ::Array{AbstractString,1}) at ./<missing>:0 

which might be related to:

lobi@orange4:~/.julia/v0.5/Iplot$ git status
On branch master
Your branch is ahead of 'origin/master' by 1 commit.
  (use "git push" to publish your local commits)

nothing to commit, working directory clean
lobi@orange4:~/.julia/v0.5/Iplot$ git remote -v
origin  /home/lobi/.julia/v0.5/Iplot/../../v0.4/Iplot/ (fetch)
origin  /home/lobi/.julia/v0.5/Iplot/../../v0.4/Iplot/ (push)

so a dirty package and git remote via filesystem.

Is this not allowed anymore?