How to install erpnext-healtcare ??

[misbahartra]

bench get-app erpnext-healtcare https://github.com/ESS-LLP/erpnext-healthcare --branch master

i get some error

INFO:bench.app:getting app erpnext-healthcare
INFO:bench.utils:git clone https://github.com/ESS-LLP/erpnext-healthcare --branch master --depth 1 --origin upstream
Cloning into 'erpnext-healthcare'...
remote: Enumerating objects: 5304, done.
remote: Counting objects: 100% (5304/5304), done.
remote: Compressing objects: 100% (4184/4184), done.
remote: Total 5304 (delta 1634), reused 2371 (delta 1003), pack-reused 0
Receiving objects: 100% (5304/5304), 14.87 MiB | 2.99 MiB/s, done.
Resolving deltas: 100% (1634/1634), done.
Traceback (most recent call last):
File "/usr/local/bin/bench", line 11, in
load_entry_point('bench', 'console_scripts', 'bench')()
File "/home/bench-repo/bench/cli.py", line 40, in cli
bench_command()
File "/home/frappe/.local/lib/python2.7/site-packages/click/core.py", line 764, in call
return self.main(*args, **kwargs)
File "/home/frappe/.local/lib/python2.7/site-packages/click/core.py", line 717, in main
rv = self.invoke(ctx)
File "/home/frappe/.local/lib/python2.7/site-packages/click/core.py", line 1137, in invoke
return _process_result(sub_ctx.command.invoke(sub_ctx))
File "/home/frappe/.local/lib/python2.7/site-packages/click/core.py", line 956, in invoke
return ctx.invoke(self.callback, **ctx.params)
File "/home/frappe/.local/lib/python2.7/site-packages/click/core.py", line 555, in invoke
return callback(*args, **kwargs)
File "/home/bench-repo/bench/commands/make.py", line 40, in get_app
get_app(git_url, branch=branch)
File "/home/bench-repo/bench/app.py", line 132, in get_app
os.rename(os.path.join(apps_path, repo_name), os.path.join(apps_path, app_name))
OSError: [Errno 39] Directory not empty