I recently updated to the latest Propellor and now I'm getting an error building on a remote host:

[86 of 94] Compiling Propellor.Bootstrap ( src/Propellor/Bootstrap.hs, dist/build/propellor-config/propellor-config-tmp/Propellor/Bootstrap.o )

    src/Propellor/Bootstrap.hs:237:22:
    No instance for (Typeable Bootstrapper)
      arising from a use of `fromInfo'
    Possible fix:
      add an instance declaration for (Typeable Bootstrapper)
    In the expression: fromInfo (maybe mempty hostInfo mh)
    In a stmt of a 'do' block:
      case fromInfo (maybe mempty hostInfo mh) of {
        NoInfoVal
          -> do { bs <- getGitConfigValue "propellor.buildsystem";
                  case bs of {
                    Just "stack" -> ...
                    _ -> ... } }
        InfoVal bs
          -> case getBuilder bs of {
               Cabal -> cabalBuild msys
               Stack -> stackBuild msys } }
    In the second argument of `($)', namely
      `do { case fromInfo (maybe mempty hostInfo mh) of {
              NoInfoVal -> do { ... }
              InfoVal bs
                -> case getBuilder bs of {
                     Cabal -> ...
                     Stack -> ... } } }'
propellor: cabal build failed

I guess I'm missing something, but not sure what?