--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 'FD: Further Discussion' <<EOF
odyx: H > M > W > FD
+bremner: M > W > H > FD
+gwolf: H > M > FD > W
+ntyni: M > H > W > FD
+marga: M > W > H > FD
+fil: H > M > FD > W
EOF