Hello Guix,

As briefly discussed with Marius on IRC, we both tried to fix
LibreOffice on ‘core-updates’.  The initial problem is that some of the
libraries it depends on fail to build with the new Boost.

I started upgrading the whole shebang but eventually got stuck with
LibreOffice itself, which fails to build like this:

--8<---------------cut here---------------start------------->8---
[build PAG] writer
[build MOD] embedserv
[build CUS] extras/glade
[build XSL] Classy_Red/styles.xml
make[1]: *** No rule to make target '/tmp/guix-build-libreoffice-6.2.0.0.alpha1.drv-0/libreoffice-6.2.0.0.alpha1/external/tarballs/49a64f3bcf20a7909ba2751349231d6652ded9cd2840e961b5164d09de3ffa63-opens___.ttf', needed by '/tmp/guix-build-libreoffice-6.2.0.0.alpha1.drv-0/libreoffice-6.2.0.0.alpha1/workdir/CustomTarget/extras/fonts/opens___.ttf'.  Stop.
make[1]: *** Waiting for unfinished jobs....
make: *** [Makefile:286: build] Error 2
--8<---------------cut here---------------end--------------->8---

Below is what I have so far.  Help welcome!

Ludo’.