fetch chromium - No such file or directory - chromium

Question

I've cloned depot tools given instructions from here on ubuntu 17.04.
When I run fetch chromium I get the following error.
./fetch chromium
Running: gclient root
Traceback (most recent call last):
File "./fetch.py", line 299, in <module>
sys.exit(main())
File "./fetch.py", line 294, in main
return run(options, spec, root)
File "./fetch.py", line 280, in run
if not options.force and checkout.exists():
File "./fetch.py", line 82, in exists
gclient_root = self.run_gclient('root').strip()
File "./fetch.py", line 78, in run_gclient
return self.run(cmd_prefix + cmd, **kwargs)
File "./fetch.py", line 68, in run
return subprocess.check_output(cmd, **kwargs)
File "/usr/lib/python2.7/subprocess.py", line 212, in check_output
process = Popen(stdout=PIPE, *popenargs, **kwargs)
File "/usr/lib/python2.7/subprocess.py", line 390, in __init__
errread, errwrite)
File "/usr/lib/python2.7/subprocess.py", line 1024, in _execute_child
raise child_exception
OSError: [Errno 2] No such file or directory
I have come across similar errors in stackoverflow while searching for a resolution however none of them helped resolve the problem.
I'm not clear on if there is any steps required after cloning to install depot tools? The readme
Any thoughts on what is required to solve the problem?
Conteh