Plan 9 from Bell Labs’s /usr/web/sources/contrib/yk/lab/freetype+ttf2subf/docs/MAKEPP
As a special exception, FreeType can also be built with the 'makepp' build tool, available from https://makepp.sourceforge.net. Note, however, that you will need at least version 2.0 and pass the option --norc-substitution to have it work correctly.