--- a/mercurial/vfs.py	Tue Mar 21 06:50:28 2017 -0700
+++ b/mercurial/vfs.py	Tue Mar 21 06:50:28 2017 -0700
@@ -401,10 +401,7 @@
     def symlink(self, src, dst):
         self.audit(dst)
         linkname = self.join(dst)
-        try:
-            os.unlink(linkname)
-        except OSError:
-            pass
+        util.tryunlink(linkname)
 
         util.makedirs(os.path.dirname(linkname), self.createmode)