Failure on pip dependency

I am getting an error when trying to build this project with: bazel build //....

https://github.com/JoostvDoorn/bazel-python-pip-error

I am not sure what to do with this error:

ERROR: /home/joost/.cache/bazel/_bazel_joost/7e57e77db4ea624dac6cd9819533e43f/external/pypi__requests_oauthlib_0_8_0/BUILD:15:1: Traceback (most recent call last):
	File "/home/joost/.cache/bazel/_bazel_joost/7e57e77db4ea624dac6cd9819533e43f/external/pypi__requests_oauthlib_0_8_0/BUILD", line 15
		py_library(name = "rsa", deps = [":pkg", requ...")])
	File "/home/joost/.cache/bazel/_bazel_joost/7e57e77db4ea624dac6cd9819533e43f/external/pypi__requests_oauthlib_0_8_0/BUILD", line 18, in py_library
		requirement("oauthlib[rsa]")
	File "/home/joost/.cache/bazel/_bazel_joost/7e57e77db4ea624dac6cd9819533e43f/external/my_deps/requirements.bzl", line 74, in requirement
		fail(("Could not find pip-provided de...))
Could not find pip-provided dependency: 'oauthlib[rsa]'