Issue building

[lobsterosagie]

*** Fetching swift-hoedown
*** Fetching hoedown
*** Checking out hoedown at "3.0.2"
*** Checking out swift-hoedown at "0.1.2"
Parse error: expected submodule commit SHA in output of task (ls-tree -z 0.1.2 Carthage/Checkouts/hoedown) but encountered: