Pin versions of pip, setuptools, wheel

taskcluster/tc-benchmark-tests.sh

@@ -94,7 +94,7 @@ pyenv virtualenv ${pyver} ${PYENV_NAME}
 source ${PYENV_ROOT}/versions/${pyver}/envs/${PYENV_NAME}/bin/activate
 
 set -o pipefail
-pip install --upgrade pip setuptools wheel | cat
+pip install --upgrade pip==19.3.1 setuptools==45.0.0 wheel==0.33.6 | cat
 pip install -r ${DS_ROOT_TASK}/DeepSpeech/ds/requirements.txt | cat
 set +o pipefail
 

taskcluster/tc-evaluate_tflite.sh

@@ -40,7 +40,7 @@ virtualenv_activate "${pyalias}" "${PYENV_NAME}"
 deepspeech_pkg_url=$(get_python_pkg_url ${pyver_pkg} ${py_unicode_type})
 set -o pipefail
 LD_LIBRARY_PATH=${PY37_LDPATH}:$LD_LIBRARY_PATH pip install --verbose --only-binary :all: ${PY37_SOURCE_PACKAGE} --upgrade ${deepspeech_pkg_url} | cat
-pip install --upgrade pip setuptools wheel | cat
+pip install --upgrade pip==19.3.1 setuptools==45.0.0 wheel==0.33.6 | cat
 pip install --upgrade -r ${HOME}/DeepSpeech/ds/requirements.txt | cat
 set +o pipefail
 

taskcluster/tc-single-shot-inference.sh

@@ -29,7 +29,7 @@ setup_pyenv_virtualenv "${pyver}" "${PYENV_NAME}"
 virtualenv_activate "${pyver}" "${PYENV_NAME}"
 
 set -o pipefail
-pip install --upgrade pip setuptools wheel | cat
+pip install --upgrade pip==19.3.1 setuptools==45.0.0 wheel==0.33.6 | cat
 pip install --upgrade -r ${HOME}/DeepSpeech/ds/requirements.txt | cat
 set +o pipefail
 

taskcluster/tc-train-tests.sh

@@ -43,7 +43,7 @@ pyenv virtualenv ${pyver} ${PYENV_NAME}
 source ${PYENV_ROOT}/versions/${pyver}/envs/${PYENV_NAME}/bin/activate
 
 set -o pipefail
-pip install --upgrade pip setuptools wheel | cat
+pip install --upgrade pip==19.3.1 setuptools==45.0.0 wheel==0.33.6 | cat
 pip install --upgrade -r ${HOME}/DeepSpeech/ds/requirements.txt | cat
 set +o pipefail