Can't build sam with missing wheel for PyYaml

Description

I am trying to use sam build to build my lambda and test it locally with a requirements.txt that includes the awscli. This in turn requires pyyaml. pyyaml is missing a wheel, and when sam tries to resolve this by building from the sdist it can’t do it. What appear to be the relevant sections of the build logs are below.

When I omit the awscli dependency, the build succeeds. When I deploy the Lambda to AWS using a cloudformation pipeline, it uses the Pipfile instead of the requirements.txt, and it is able to deploy successfully. But I can’t use sam to build and test my lambda locally.

Steps to reproduce

Create a Lambda that includes a dependency of awscli==1.16.155 and/or pyyaml==3.13 and run sam build

Observed result

2019-05-10 10:21:25 Build missing wheels from sdists (C compiling True): {rbt-utilities==0.0.1(sdist), pyyaml==3.13(sdist), article-data==0.0.1(sdist), awscli-wrapper==0.0.1(sdist), vectorizer==0.0.1(sdist), classifier==0.0.1(sdist), binarizer==0.0.1(sdist), nltk==3.4.1(sdist)}
...
2019-05-10 10:21:27 calling pip wheel --no-deps --wheel-dir /var/folders/cs/xfy7j9k12gvc12l0v9tvt0k1l7nvry/T/tmpx8snqxbs /var/folders/cs/xfy7j9k12gvc12l0v9tvt0k1l7nvry/T/tmpx8snqxbs/PyYAML-3.13.tar.gz
...
2019-05-10 10:21:41 compatible after building wheels (no C compiling): {ply==3.11(wheel), html2text==2018.1.9(wheel), requests==2.21.0(wheel), colorama==0.3.9(wheel), psycopg2==2.7.7(wheel), pyasn1==0.4.5(wheel), decorator==4.4.0(wheel), binarizer==0.0.1(wheel), certifi==2019.3.9(wheel), scikit-learn==0.21.0(wheel), scipy==1.2.1(wheel), s3transfer==0.2.0(wheel), python-dateutil==2.8.0(wheel), chardet==3.0.4(wheel), botocore==1.12.145(wheel), scikit-multilearn==0.2.0(wheel), awscli==1.16.155(wheel), boto3==1.9.145(wheel), rbt-utilities==0.0.1(wheel), article-data==0.0.1(wheel), awscli-wrapper==0.0.1(wheel), vectorizer==0.0.1(wheel), classifier==0.0.1(wheel), urllib3==1.24.3(wheel), nltk==3.4.1(wheel), jmespath==0.9.4(wheel), six==1.12.0(wheel), numpy==1.16.3(wheel), boto==2.49.0(wheel), rsa==3.4.2(wheel), joblib==0.13.2(wheel), docutils==0.14(wheel), idna==2.8(wheel), datadog==0.28.0(wheel)}
2019-05-10 10:21:41 Build missing wheels from sdists (C compiling False): {pyyaml==3.13(sdist)}
2019-05-10 10:21:41 calling pip wheel --no-deps --wheel-dir /var/folders/cs/xfy7j9k12gvc12l0v9tvt0k1l7nvry/T/tmpx8snqxbs /var/folders/cs/xfy7j9k12gvc12l0v9tvt0k1l7nvry/T/tmpx8snqxbs/PyYAML-3.13.tar.gz
...

2019-05-10 10:21:42 Final compatible: {ply==3.11(wheel), html2text==2018.1.9(wheel), requests==2.21.0(wheel), colorama==0.3.9(wheel), psycopg2==2.7.7(wheel), pyasn1==0.4.5(wheel), decorator==4.4.0(wheel), binarizer==0.0.1(wheel), certifi==2019.3.9(wheel), scikit-learn==0.21.0(wheel), scipy==1.2.1(wheel), s3transfer==0.2.0(wheel), python-dateutil==2.8.0(wheel), chardet==3.0.4(wheel), botocore==1.12.145(wheel), scikit-multilearn==0.2.0(wheel), awscli==1.16.155(wheel), boto3==1.9.145(wheel), rbt-utilities==0.0.1(wheel), article-data==0.0.1(wheel), awscli-wrapper==0.0.1(wheel), vectorizer==0.0.1(wheel), classifier==0.0.1(wheel), urllib3==1.24.3(wheel), nltk==3.4.1(wheel), jmespath==0.9.4(wheel), six==1.12.0(wheel), numpy==1.16.3(wheel), boto==2.49.0(wheel), rsa==3.4.2(wheel), joblib==0.13.2(wheel), docutils==0.14(wheel), idna==2.8(wheel), datadog==0.28.0(wheel)}
2019-05-10 10:21:42 Final incompatible: {scikit-learn==0.21.0(wheel), scipy==1.2.1(wheel), pyyaml==3.13(wheel), numpy==1.16.3(wheel), psycopg2==2.7.7(wheel)}
2019-05-10 10:21:42 Final missing wheels: {pyyaml==3.13(sdist)}
2019-05-10 10:21:47 PythonPipBuilder:ResolveDependencies failed
Traceback (most recent call last):
  File "/usr/local/Cellar/aws-sam-cli/0.15.0/libexec/lib/python3.7/site-packages/aws_lambda_builders/workflows/python_pip/actions.py", line 39, in execute
    self.scratch_dir
  File "/usr/local/Cellar/aws-sam-cli/0.15.0/libexec/lib/python3.7/site-packages/aws_lambda_builders/workflows/python_pip/packager.py", line 143, in build_dependencies
    requirements_path, artifacts_dir_path, scratch_dir_path)
  File "/usr/local/Cellar/aws-sam-cli/0.15.0/libexec/lib/python3.7/site-packages/aws_lambda_builders/workflows/python_pip/packager.py", line 212, in build_site_packages
    raise MissingDependencyError(packages_without_wheels)
aws_lambda_builders.workflows.python_pip.packager.MissingDependencyError: {pyyaml==3.13(sdist)}

(note: the other missing ones are local project specific packages each with their own setup.py file in the same repo)

Expected result

I expect the build to succeed

Additional environment details (Ex: Windows, Mac, Amazon Linux etc)

1. OS: Mac OS Sierra
2. sam --version: SAM CLI, version 0.15.0

[sriram-mv]

Was able to buid pyyaml as well simplejson within a container, so closing this issue.

[sriram-mv]

Have you tried sam build --use-container