Pypy pybind handling: Disable force-copying of environment, switch to...

    #  $PIP install git+https://bitbucket.org/pypy/numpy.git

    if [[ "$i" = *pybind11* ]] && [[ "${PY_EXE}" == pypy* ]]; then

      # Work around https://github.com/pypa/virtualenv/issues/1198

      # (now fixed: commented out on Mar 28, 2020, OK to remove if no trouble in a few months)

      # Running virtualenv --always-copy or -m venv --copies should also do the trick.

      L=$(readlink .env/include)

      rm .env/include

      cp -R $L .env/include

      # L=$(readlink .env/include)

      # rm .env/include

      # cp -R $L .env/include

      # context:

      # https://github.com/conda-forge/pyopencl-feedstock/pull/45

      # https://github.com/pybind/pybind11/pull/2146

      $PIP install git+https://github.com/isuruf/pybind11@pypy3

      $PIP install $i

    elif [ "$i" = "numpy" ] && [[ "${PY_EXE}" == python2.6* ]]; then

      $PIP install 'numpy==1.10.4'

    else