--- a/setup.c	2010-02-07 22:50:40.000000000 -0200
+++ b/setup.c	2010-02-07 22:51:56.000000000 -0200
@@ -413,7 +413,12 @@
 	inside_git_dir = 0;
 	if (!work_tree_env)
 		inside_work_tree = 1;
-	git_work_tree_cfg = xstrndup(cwd, offset);
+	if ( cwd[0] == '/' && offset == 0 ) {
+		git_work_tree_cfg = xstrndup(cwd, 1);
+	}
+	else {
+		git_work_tree_cfg = xstrndup(cwd, offset);
+	}
 	if (check_repository_format_gently(nongit_ok))
 		return NULL;
 	if (offset == len)