--option 'W: `weak`: both directory schemes are allowed, but packages should only be built on hosts with classical directory schemes (or in such chroots)' \
--option 'M: `middle`: both directory schemes are allowed, and packages (including official packages) can be built on hosts with either classical or "merged `/usr`" directory schemes' \
--option 'H: `hard`: both directory schemes are allowed, but packages should only be built on hosts with "merged `/usr`" directory schemes (or in such chroots)' \
--option 'W: `weak`: both directory schemes are allowed, but packages should only be built on hosts with classical directory schemes (or in such chroots)' \
--option 'M: `middle`: both directory schemes are allowed, and packages (including official packages) can be built on hosts with either classical or "merged `/usr`" directory schemes' \
--option 'H: `hard`: both directory schemes are allowed, but packages should only be built on hosts with "merged `/usr`" directory schemes (or in such chroots)' \