Janus snipmate error

gistfile1.txt

****************************************
*         Installing snipmate          *
****************************************

** Invoke snipmate:install (first_time)
** Invoke snipmate:pull (first_time)
** Invoke /Users/adrian/.vim/tmp/snipmate (first_time)
** Invoke tmp (not_needed)
** Execute /Users/adrian/.vim/tmp/snipmate
git clone git://github.com/msanders/snipmate.vim.git /Users/adrian/.vim/tmp/snipmate
Cloning into /Users/adrian/.vim/tmp/snipmate...
remote: Counting objects: 791, done.
remote: Compressing objects: 100% (302/302), done.
remote: Total 791 (delta 385), reused 755 (delta 360)
Receiving objects: 100% (791/791), 140.06 KiB, done.
Resolving deltas: 100% (385/385), done.
git clone git://github.com/garbas/vim-snipmate.git /Users/adrian/.vim/tmp/snipmate
fatal: destination path '/Users/adrian/.vim/tmp/snipmate' already exists and is not an empty directory.
rake aborted!