PKG: use a new way to generate wheels

scripts/install-deps.sh

@@ -15,10 +15,14 @@ sudo apt-get install -y \
 # These packages are installed in the base environment but may be older
 # versions. Explicitly upgrade them because they often create
 # installation problems if out of date.
-python -m pip install --upgrade pip setuptools wheel numpy
+# python -m pip install --upgrade pip setuptools wheel numpy
+python -m pip install --upgrade pip setuptools build numpy
 
 # # Generate .whl file.
-python setup.py sdist bdist_wheel
+# python setup.py sdist bdist_wheel
+
+# New style:
+python -m build .
 
 # Install this package and the packages listed in requirements.txt.
 pip install -v .