Guix locales on native distro's

[Pjotr Prins <pjotr.public12@thebird.nl>]

This used to work:

  https://github.com/pjotrp/guix-notes/blob/master/INSTALL.org#set-locale

But lately my locales have been giving me grief and I
want to crack it once and for all. I am running Guix tools on a
non-Guix distro.

First, as per instructions of 

  https://www.gnu.org/software/guix/manual/html_node/Application-Setup.html#locales_002dand_002dlocpath, 

I have installed glibc-utf8-locales which set them for glibc-2.25 and set

  export GUIX_LOCPATH=$HOME/.guix-profile/lib/locale

  ls $GUIX_LOCPATH/2.25/

     en_US.UTF-8
     (etc)

When I run  

   ~/.guix-profile/bin/locale -a
     C
     POSIX

Which looks limited, but is probably correct.

I am running locale, bash, xterm etc. as Guix tools all linked to
glibc-2.25. I am *not* getting the infamous locale errors. After
setting

  export LC_ALL=en_US.UTF-8
 
and

  locale
    LANG=en_US.UTF-8
    LC_CTYPE="en_US.UTF-8"
    LC_NUMERIC="en_US.UTF-8"
    LC_TIME="en_US.UTF-8"
    LC_COLLATE="en_US.UTF-8"
    LC_MONETARY="en_US.UTF-8"
    LC_MESSAGES="en_US.UTF-8"
    LC_PAPER="en_US.UTF-8"
    LC_NAME="en_US.UTF-8"
    LC_ADDRESS="en_US.UTF-8"
    LC_TELEPHONE="en_US.UTF-8"
    LC_MEASUREMENT="en_US.UTF-8"
    LC_IDENTIFICATION="en_US.UTF-8"
    LC_ALL=en_US.UTF-8

All should be well. But when I read or write an E-mail using mutt or
vim (both linked correctly) I don't get to see UTF8. I don't get
non-ASCII output (Ludo's surname, for example).

Oh yes, I am running uxterm and bash from Guix with the correct glibc. All
tools are GUIX based except for X itself. E.g.

  ldd `which xterm`
    libc.so.6 => /gnu/store/ybpgv1v7606xw7mafda66w10hiynpiw2-glibc-2.25/lib/libc.so.6 (0x00007fad9302f000)
    (etc)

Relevant environment settings:

  GUIX_LOCPATH=/home/wrk/.guix-profile/lib/locale
  PATH=/home/wrk/izip/git/opensource/scripts:/home/wrk/.guix-profile/bin:/home/wrk/.guix-profile/sbin:/usr/bin:/bin
  SHELL=/home/wrk/.guix-profile/bin/bash
  TERM=xterm
  TERMINAL=guixterm
  XTERM=xterm
  XTERM_LOCALE=en_US.UTF-8
  XTERM_SHELL=/bin/bash
  XTERM_VERSION='XTerm(322)'

where /bin/bash actually points to a Guix bash.

What is it I am missing? 

Pj.