Sorry if this is plain silly, I was trying to use "jekyll import" (bundle-updated) to import my dotclear blog, as documented in https://import.jekyllrb.com/docs/dotclear/ and I get

jekyll 4.3.2 | Error: Whoops, we can't understand your command. jekyll 4.3.2 | Error: invalid option: --datafile jekyll 4.3.2 | Error: Run your command again with the --help switch to see available options. /home/jr/gems/gems/mercenary-0.4.0/lib/mercenary/program.rb:33:in go': invalid option: --datafile (OptionParser::InvalidOption)
`

"jekyll import --help" doesn't help. Tried to find out what's the matter, and I found a jekyll/commands/import.rb file that included all the importers but dotclear. Is it an oversight or has it been removed as obsolete?