Fix etherpad install

                 f"wget https://github.com/ether/etherpad-lite/"
                 f"archive/refs/tags/v{etherpad_version}.tar.gz"
             )
-            clone_wd.run(f"tar xf etherpad-lite-{etherpad_version}")
+            clone_wd.run(f"tar xf v{etherpad_version}.tar.gz")
             clone_wd.run(f"mv etherpad-lite-{etherpad_version} etherpad-lite")
             with clone_wd.cd("etherpad-lite") as ep_wd:
                 with ep_wd.cd("src") as src_wd: