The project build fails after new iniconfig release yesterday.

[louis-xgen]

• a detailed description of the bug or problem you are having
  iniconfig released a new version yesterday, and since then, I am experience an error running the project locally using aws sam. I have two packages in the requirements.txt which is dependent on iniconfig: pytest and pytest-cov. If I comment these out for now, the project runs fine.

• output of pip list from the virtual environment you are using

Package                Version             Location
---------------------- ------------------- ---------------------------------------
-ix                    1.11.0
aiobotocore            1.1.1
amazon-dax-client      1.1.7
aws-lambda-builders    0.9.0
aws-sam-cli            0.53.0
aws-sam-translator     1.25.0
awscli                 1.18.69
boto3                  1.13.26
botocore               1.16.26
Brlapi                 0.6.6
cachetools             4.1.1
chevron                0.13.1
click                  7.1.2
defer                  1.0.6
distlib                0.3.1
distro-info            0.18ubuntu0.18.04.1
docker                 4.3.1
e                      1.4.5
filelock               3.0.12
flake8                 3.8.3
flake8-polyfill        1.0.2
Flask                  1.0.4
fsspec                 0.8.3
future                 0.18.2
kappa                  0.6.0
language-selector      0.1
launchpadlib           1.10.6
numpy                  1.19.2
oauth                  1.0.1
olefile                0.45.1
packaging              20.4
pandas                 1.1.2
pep8-naming            0.11.1
pexpect                4.2.1
Pillow                 5.1.0
pip                    20.2.3
pyparsing              2.4.7
pytest                 6.1.1
pytest-cov             2.10.1
redis                  3.0.1
redis-py-cluster       2.1.0
regex                  2020.7.14
requests               2.23.0
requests-unixsocket    0.1.5
retrying               1.3.3
roman                  2.0.0
rsa                    4.6
rule-engine            2.2.0
scipy                  1.5.2
SecretStorage          2.3.1
serverlessrepo         0.1.9
simplejson             3.13.2
six                    1.15.0
tox                    3.20.0
typed-ast              1.4.1
typing-extensions      3.7.4.3
tzlocal                2.1
ujson                  3.2.0
vine                   1.3.0
virtualenv             20.0.31
virtualenv-clone       0.5.4
wadllib                1.3.2
Werkzeug               0.16.1
wheel                  0.35.1
wrapt                  1.12.1
wsgi-request-logger    0.4.6
xkit                   0.0.0
yarl                   1.6.0
zappa                  0.51.0
zipp                   3.2.0
zope.interface         4.3.2

• pytest and operating system versions

Python version: 3.6.9
OS version: Ubuntu 18.04
pytest version: pytest 6.1.1

• minimal example if possible
  When trying to run the build script to run the project locally, I get an build fail error saying:

Build missing wheels from sdists (C compiling False): {iniconfig==0.0.0(sdist)}
calling pip wheel --no-deps --wheel-dir /tmp/samcli/scratch /tmp/samcli/scratch/iniconfig-1.1.1.tar.gz
compatible after building wheels (C compiling): {inflection==0.5.1(wheel), cffi==1.14.3(wheel), pyfiglet==0.8.post1(wheel), pycryptodome==3.9.8(wheel), pyparsing==2.4.7(wheel), coverage==5.3(wheel), zipp==3.3.0(wheel), urllib3==1.25.10(wheel), rule-engine==2.3.0(wheel), amazon-dax-client==1.1.7(wheel), jmespath==0.10.0(wheel), requests==2.24.0(wheel), redis-py-cluster==2.1.0(wheel), importlib-metadata==2.0.0(wheel), boto3==1.15.16(wheel), cachetools==4.1.1(wheel), python-dateutil==2.8.1(wheel), antlr4-python3-runtime==4.7.2(wheel), packaging==20.4(wheel), py==1.9.0(wheel), certifi==2020.6.20(wheel), ecdsa==0.14.1(wheel), pyasn1==0.4.8(wheel), six==1.15.0(wheel), idna==2.10(wheel), s3transfer==0.3.3(wheel), msgpack==1.0.0(wheel), zstandard==0.14.0(wheel), cryptography==3.1.1(wheel), python-jose==3.2.0(wheel), pytest==6.1.1(wheel), pytest-cov==2.10.1(wheel), iniconfig==1.1.1(wheel), pyjwt==1.7.1(wheel), ply==3.11(wheel), botocore==1.18.16(wheel), chardet==3.0.4(wheel), pycparser==2.20(wheel), pluggy==0.13.1(wheel), attrs==20.2.0(wheel), redis==3.5.3(wheel), pytz==2020.1(wheel), simplejson==3.17.2(wheel), rsa==4.6(wheel), toml==0.10.1(wheel)}
Final compatible: {inflection==0.5.1(wheel), cffi==1.14.3(wheel), pyfiglet==0.8.post1(wheel), pycryptodome==3.9.8(wheel), pyparsing==2.4.7(wheel), coverage==5.3(wheel), zipp==3.3.0(wheel), urllib3==1.25.10(wheel), rule-engine==2.3.0(wheel), amazon-dax-client==1.1.7(wheel), jmespath==0.10.0(wheel), requests==2.24.0(wheel), redis-py-cluster==2.1.0(wheel), importlib-metadata==2.0.0(wheel), boto3==1.15.16(wheel), cachetools==4.1.1(wheel), python-dateutil==2.8.1(wheel), antlr4-python3-runtime==4.7.2(wheel), packaging==20.4(wheel), py==1.9.0(wheel), certifi==2020.6.20(wheel), ecdsa==0.14.1(wheel), pyasn1==0.4.8(wheel), six==1.15.0(wheel), idna==2.10(wheel), s3transfer==0.3.3(wheel), msgpack==1.0.0(wheel), zstandard==0.14.0(wheel), cryptography==3.1.1(wheel), python-jose==3.2.0(wheel), pytest==6.1.1(wheel), pytest-cov==2.10.1(wheel), iniconfig==1.1.1(wheel), pyjwt==1.7.1(wheel), ply==3.11(wheel), botocore==1.18.16(wheel), chardet==3.0.4(wheel), pycparser==2.20(wheel), pluggy==0.13.1(wheel), attrs==20.2.0(wheel), redis==3.5.3(wheel), pytz==2020.1(wheel), simplejson==3.17.2(wheel), rsa==4.6(wheel), toml==0.10.1(wheel)}
Final incompatible: set()
Final missing wheels: {iniconfig==0.0.0(sdist)}
PythonPipBuilder:ResolveDependencies failed

[nicoddemus]

Thanks @louis-xgen for the report.

cc @RonnyPfannschmidt