[gentoo-user] Updating LibreOffice and EPYTHON

[Andrew Lowe]

Evening all,
	I'm in the middle of doing an "-NuD world" and my  Libreoffice build 
has failed right at the finish line. I get:


* ERROR: app-office/libreoffice-6.4.7.2::gentoo failed (install phase):
  *   No Python implementation set (EPYTHON is null).
  *
  * Call stack:
  *     ebuild.sh, line  125:  Called src_install
  *   environment, line 5615:  Called python_optimize 
'/var/tmp/portage/app-office/libreoffice-6.4.7.2/image/usr/lib64/libreoffice/program'
  *   environment, line 5287:  Called die
  * The specific snippet of code:
  *       [[ -n ${EPYTHON} ]] || die 'No Python implementation set 
(EPYTHON is null).';
  *


I have no idea as to what this means - besides the obvious that EPYTHON 
isn't set. Libreoffice was about the 15th item to build in pmy update so 
I assume Portage is working correctly. There is no mention of EPYTHON in

emerge --info | grep EPYTHON

emerge --info lists:
PYTHON_SINGLE_TARGET="python3_7 -python3_6 -python3_8 -python3_9"
so I assume I have a version of Python set

I've had a look at the environment file that it references, line 5287 
and once again, makes no sense to me.

I've had a look on bugs.gentoo.org and only get one bug that lists the 
error string:

https://bugs.gentoo.org/721846

but once again, makes no sense.

	Any one else seen this error? Any one got a remedy? Thoughts greatly 
appreciated,

	Andrew