+
+> I have to wonder what filesystem you have there where 147 characters
+> is a long filename. Ikiwiki already uses `POSIX::pathconf` on the srcdir
+> to look up `_PC_NAME_MAX`
+> to see if the filename is too long, and shortens it, so it seems
+> that, in additional to having a rather antique long filename limit, your
+> system also doesn't properly expose it via pathconf. Not sure what
+> ikiwiki can do here. --[[Joey]]
+
+>> This is an ext4 filesystem with default settings (which appears to mean
+>> 256 bytes for pathnames). Despite the error saying file name, it's
+>> definitely a path issue since moving my test repo to `/tmp`from
+>> `/home/jon/wd/mine/www` hides the problem. I note the following comment
+>> in `aggregate.pm`:
+
+ # Make sure that the file name isn't too long.
+ # NB: This doesn't check for path length limits.
+
+>> I don't fully grok the aggregate source yet, but I wouldn't rule out
+>> a bug in the path length checking, personally. I'm happy to try and
+>> find it myself though :) -- [[Jon]]
+
+>>> Path length seems unlikely, since the max is 4096 there.
+>>> --[[Joey]]
+
+>>>> Aggregate now used a "if it crashes, it must be too long" strategy.
+>>>> [[done]] --[[Joey]]