[pkg_rolling-replace] Updating perl and friends

[Hauke Fath <hf%spg.tu-darmstadt.de@localhost>]

All,

what is the good and proper way out when pkg_rolling-replace(8) fails with

[...]
===> Building binary package for perl-5.12.2nb1
=> Creating binary package /var/obj/pkgsrc/packages/All/perl-5.12.2nb1.tgz
===> Replacing for perl-5.12.2nb1
WARNING: experimental target - DATA LOSS MAY OCCUR.
===> Updating using binary package of perl-5.12.2nb1
/usr/pkg/sbin/pkg_add -K /var/db/pkg -U -D 
/var/obj/pkgsrc/packages/All/perl-5.12.2nb1.tgz
pkg_add: Dependency of p5-perl-headers-5.1_RC2nb4 fulfilled by 
perl-5.10.1nb2, but not by perl-5.12.2nb1
pkg_add: Dependency of p5-Module-CoreList-2.36 fulfilled by 
perl-5.10.1nb2, but not by perl-5.12.2nb1

[ loooong list omitted ]

pkg_add: Package `perl-5.12.2nb1' conflicts with 
`p5-Digest<=1.16{,nb*}', and `p5-Digest-1.16' is installed.
pkg_add: 1 package addition failed
*** Error code 1

Stop.

The first time I encountered the above, I forcefully deleted perl5, then 
installed the new one, and let pkg_rolling-replace(8) do its thing. But 
surely there must be a less disruptive way?

        hauke

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