Integer version number provided by toolchain mix-in for convenience and
internal use.
+ CMAKE
+ ``gromacs/ci-...`` Docker images built after October 2020 have several
+ versions of CMake installed. The most recent version of CMake in the
+ container will be appear first in ``PATH``. To allow individual jobs to
+ use specific versions of CMake, please write the job *script* sections
+ using ``$CMAKE`` instead of ``cmake`` and begin the *script* section with
+ a line such as ``- CMAKE=${CMAKE:-$(which cmake)}``. Specify a CMake
+ version by setting the *CMAKE* variable to the full executable path for
+ the CMake version you would like to use. See also :doc:`containers`.
+
CMAKE_COMPILER_SCRIPT
CMake command line options for a tool chain. A definition is provided by
the mix-in toolchain definitions (e.g. ``.use-gcc8``) to be appended to