The "dsyn" target needs to remain working, despite still
being dependent on GNU-isms at the moment.
Fixes: 73fe3421f1ecbdc8 ("build: support doc generation w/o GNU make")
@syn = grep(!/DSKQXS\.pm/, @syn) if !eval { require IO::KQueue };
@syn = grep(!/Unsubscribe\.pm/, @syn) if !eval { require Crypt::CBC };
@syn = grep(!/SaPlugin/, @syn) if !eval { require Mail::SpamAssasin };
+$v->{syn_files} = \@syn;
$v->{my_syntax} = [map { "$_.syntax" } @syn];
$v->{-m1} = [ map { (split('/'))[-1] } @EXE_FILES ];
$v->{-m5} = [ qw(public-inbox-config public-inbox-v1-format