update installer to cleanup /tmp/ entirely

install.lua

@@ -91,8 +91,10 @@ local function main()
     log.info("Installing")
     for k, v in ipairs(toDownload) do
       fs.delete(v.dest)
-      fs.move("/tmp/" .. v.hash .. ".lua", v.dest)
+      fs.copy("/tmp/" .. v.hash .. ".lua", v.dest)
     end
+
+    fs.delete("/tmp/")
   else
     log.info("Nothing to do")
   end