[seL4] Threads tutorial fails to initialize

Hi, I've tried to start the threads tutorial but it fails to initialize or create a build directory. Any hints for moving forward? weiqi@weiqi-ThinkPad-X250:~/sel4-tutorials-manifest-temp/threads$ sudo ../init --verbose --tut threads --solution Traceback (most recent call last): File "../init", line 96, in <module> sys.exit(main()) File "../init", line 85, in main args.task, initialised, tute_dir, build_dir, sys.stdout) File "/home/weiqi/sel4-tutorials-manifest-temp/projects/sel4-tutorials/common.py", line 100, in init_directories os.chdir(build_directory) FileNotFoundError: [Errno 2] No such file or directory: '/home/weiqi/sel4-tutorials-manifest-temp/threads_build'