archivers/xz still needed

[n dhert]

when doing portupgrade, I get
        - archivers/xz (marked as IGNORE)
since it is now in the base system
But
# pkg_info -R xz-4.999.9_1
Required by:
gtar-1.23_3
kdeutils-3.5.10_6

# pkg_info -R gtar-1.23_3
Required by:
kdeutils-3.5.10_6
I indeed still use kedutils and want to keep that version (3.5).
Is there a way to do some recompilation so that gtar and kdeutils do no
longer user xz
that I can do, to get rid of the the  IGNORE ?
How would that exactly be?