@item tracing (@option{-x}) can be obviously done only for
non-executable @file{.do}
@item parallizable build is done only during @command{redo-ifchange} for
- human convenience: you can globally enable @env{REDO_JOBS}, but
+ human convenience: you can globally enable @env{$REDO_JOBS}, but
still do for example: @code{redo htmls infos index upload}
@end itemize