Back off further

.github/workflows/build.sh

@@ -11,6 +11,8 @@ if [[ "$TRAVIS_OS_NAME" == "osx" ]]; then
   else
     export MACOSX_DEPLOYMENT_TARGET="10.10"
   fi
+  # Mac Pythons do not have toml parser by default.
+  python3 install tomli
 fi
 
 if [[ "$MB_PYTHON_VERSION" == pypy3* ]]; then
@@ -20,14 +22,13 @@ fi
 echo "::group::Install a virtualenv"
   source multibuild/common_utils.sh
   source multibuild/travis_steps.sh
-  $PYTHON_EXE -m pip install virtualenv
+  python3 -m pip install virtualenv
   before_install
 echo "::endgroup::"
 
 echo "::group::Build wheel"
   export WHEEL_SDIR=wheelhouse
-  $PIP_CMD install tomlkit
-  export BUILD_DEPENDS=$($PYTHON_EXE ./print_deps.py ${MB_PYTHON_VERSION} ${REPO_DIR})
+  export BUILD_DEPENDS=$(python3 ./print_deps.py ${MB_PYTHON_VERSION} ${REPO_DIR})
   clean_code
   build_wheel
   ls -l "${GITHUB_WORKSPACE}/${WHEEL_SDIR}/"

config.sh

@@ -1,11 +1,6 @@
 # Define custom utilities
 # Test for OSX with [ -n "$IS_MACOS" ]
 
-function pip_wheel_cmd {
-    local abs_wheelhouse=$1
-    pip wheel $(pip_opts) -w $abs_wheelhouse --no-build-isolation --no-deps .
-}
-
 function run_tests {
     # Runs tests on installed distribution from an empty directory
     python --version

print_deps.py

@@ -6,12 +6,15 @@
 from pathlib import Path
 from argparse import ArgumentParser, RawDescriptionHelpFormatter
 
-import tomlkit
+try:
+    import tomllib as tlib
+except ImportError:
+    import tomli as tlib
 
 
 def get_phase_requirements(repo_path, phase='build'):
     toml = (Path(repo_path) / 'pyproject.toml').read_text()
-    config = tomlkit.loads(toml)
+    config = tlib.loads(toml)
     if phase == 'build':
         requires = config.get('build-system', {}).get('requires', [])
     else: