The version of magit-stgit.el in this repository is compatible with the NEXT branch of magit.  The MASTER branch of the magit repository still bundles a compatible version of magit-svn.el.  Most likely you are not using magit's NEXT branch, and should therefor NOT use this repository.  The magit AND magit-svn packages (and some others) which are distributed on MELPA and MELPA-STABLE are build from the MASTER branch of the magit repository.  Also, see: