unknown datatype in justc-envdir.c

[tseeling]

Cannot compile from latest source but this fixes it:

sed -i -e 's!subgetopt_t!subgetopt!' src/justc-envdir/justc-envdir.c

[skarnet]

justc-envdir isn't being maintained anymore. You should switch to s6-overlay v3, which doesn't need justc-envdir.