The packages within the MSYS/Contributed directory are supported by
individual contributors and not by the MinGW team. These are often
useful additions to an MSYS installation, but are not considered crucial
and are therefore not part of the Minimal System.
To install files distributed by MinGW we suggest you use the mingw-get
installer https://sourceforge.net/projects/mingw/files/Installer/ and
you can choose mingw-get or mingw-get-inst. Mingw-get-inst is a wrapper
for mingw-get using InnoSetup, more can be found in the mingw-get-inst