bug#41668: Failing test: gui-installed-desktop-os-encrypted

[Mathieu Othacehe]

Hello Brice,

> For some time now the system test 'gui-installed-desktop-os-encrypted'
> doesn't succeed, the last time it passed was 2020-04-11[0]. This is
> problematic since it exercise a lot of packages and thus can be used to
> test those packages. Ludovic attempted to fixed it[1] but it didn't fixed
> the test on my side.

The "gui-installed-*" tests are in a bad shape right now. The good news
is that the can reveal many issues, the bad news is that I can't keep
the distance fixing them.

They are affected by:

* Shepherd race condition: https://issues.guix.gnu.org/40981. But this
should be fixed with the recent 0.8.1 release.

* The cow-store issue here:
https://lists.gnu.org/archive/html/guix-devel/2020-06/msg00043.html.

* A new issue I discovered, whereby 'guix system init' try to
build/download stuff, when it shouldn't:

--8<---------------cut here---------------start------------->8---
Jun  6 11:50:06 localhost shepherd[1]: Service cow-store has been started. 
Jun  6 11:50:06 localhost installer[233]: running command ("guix" "system" 
"init" "--fallback" "--no-grafts" "--no-substitutes" "/mnt/etc/config.scm" 
"/mnt") 
Jun  6 11:50:20 localhost installer[233]: 'guix system init --fallback 
--no-grafts --no-substitutes /mnt/etc/config.scm /mnt' exited with status 1; 
output follows:    The following derivations will be bu)

Jun  6 11:50:20 localhost 7-gzip-mesboot-1.2.4.drv      
/gnu/store/zrqjn3p0x5gkdnj6qb4b9xxl2dld4fvl-gzip-1.2.4.tar.drv      
/gnu/store/98g8d622pqhzl0z92y4bjcqi9yl0327x-linux-libre-headers-bootstrap-0.drv2
Jun  6 11:50:20 localhost g76sla-bash-mesboot-4.4.drv      
/gnu/store/8yad2zhh91pnf27xkwh0kyx4ggnsn5li-bash-4.4.tar.gz.drv      
/gnu/store/5vp07s0gdvrybbhcz43i58y5p03rrdsk-coreutils-mesboot-8.32.drv     k
Jun  6 11:50:20 localhost h6mfp7hisj118ndcp8d0wy3ca63-gmp-6.0.0a.tar.xz.drv     
 /gnu/store/iy7vn17sqbrgp2142px897ij0njsr5f2-gmp-6.0.0a.tar.xz.drv      
/gnu/store/rxr1wc67y74bsfasln4jw8viawpa79g4-mpfr-4.0
Jun  6 11:50:20 localhost ilding 
/gnu/store/3pz8g76l2kkv36w1n7k25zlswgdyj554-Python-3.5.9.tar.xz.drv...   
builder for 
`/gnu/store/3pz8g76l2kkv36w1n7k25zlswgdyj554-Python-3.5.9.tar.xz.drv' failed to 
produg
Jun  6 11:50:20 localhost  
--8<---------------cut here---------------end--------------->8---

Thanks,

Mathieu