According to ShellCheck's documentation:
Different shells support different features. To give effective advice,
ShellCheck needs to know which shell your script is going to run on.
Related: https://www.shellcheck.net/wiki/SC2148
Related: #470
New cookbook discussing various strategies for creating modulefiles for
packages with multiple builds depending on previously loaded compiler,
MPI libraries etc. (E.g. handling different "flavors" of packages)
