The Environment Modules package provides for the dynamic modification of
a user's environment via modulefiles.

Each modulefile contains the information needed to configure the shell
for an application. Once the Modules package is initialized, the
environment can be modified on a per-module basis using the module
command which interprets modulefiles. Typically modulefiles instruct
the module command to alter or set shell environment variables such as
PATH, MANPATH, etc. modulefiles may be shared by many users on a system
and users may have their own collection to supplement or replace the
shared modulefiles.

Modules can be loaded and unloaded dynamically and atomically, in an
clean fashion. All popular shells are supported, including bash, ksh,
zsh, sh, csh, tcsh, as well as some scripting languages such as perl.

Modules are useful in managing different versions of applications.
Modules can also be bundled into metamodules that will load an entire
suite of different applications.

NOTE: You will need to get a new shell after installing this package to
have access to the module alias.

1. build dependencies:
   1. coreutils
   2. rpm-macros-alternatives
   3. dejagnu
   4. gcc
   5. libprocps
   6. less
   7. libtcl
   8. sed
   9. tcl
   10. tcl-devel
   11. procps