bug#72061: Discrepancy when running ‘guix pull’ from different machines

[Ludovic Courtès]

Ludovic Courtès <ludovic.courtes@inria.fr> skribis:

> Digging into the derivation graph reveals the difference below in the
> derivation that builds the grafted avahi:
>
> diff -ubBr --show-c-function --label \#\<buffer\ 
> 32kpijl743qn7v337i19dd1hph1rd6x7-avahi-0.8-builder\> --label \#\<buffer\ 
> z1kanbslzb2lrr1hj922a50zkxl9jz28-avahi-0.8-builder\> 
> /tmp/buffer-content-tBGXyv /tmp/buffer-content-XM8vEv
> --- #<buffer 32kpijl743qn7v337i19dd1hph1rd6x7-avahi-0.8-builder>
> +++ #<buffer z1kanbslzb2lrr1hj922a50zkxl9jz28-avahi-0.8-builder>
> @@ -23,11 +23,11 @@
>         (("/gnu/store/ill8bkp6wshj15nc4fxk4wgln15rgyi6-libevent-2.1.12" . 
> "/gnu/store/s6jj1mrdhi2l2860zd9n609qfhlgjc1m-libevent-2.1.12")
>          ("/gnu/store/930nwsiysdvy2x5zv1sf6v7ym75z8ayk-gcc-11.3.0-lib" . 
> "/gnu/store/6ncav55lbk5kqvwwflrzcr41hp5jbq0c-gcc-11.3.0-lib")
>          ("/gnu/store/gsjczqir1wbz8p770zndrpw4rnppmxi3-glibc-2.35" . 
> "/gnu/store/ln6hxqjvz6m9gdd9s97pivlqck7hzs99-glibc-2.35")
> +        ("/gnu/store/36my0g0j72b3vbz0gj1l8f0lmmgfkv3w-glib-2.72.3" . 
> "/gnu/store/m26kdkgr4c09wc0djn2pgcz9jl7j2rw1-glib-2.72.3")
>          ("/gnu/store/2w976k6g70gkfih9wwhalqsni209vcqz-gdbm-1.23" . 
> "/gnu/store/z655ilai81pbzbm35zwfqc64ha7wl37k-gdbm-1.23")
>          ("/gnu/store/x2a1qx3syync9q4ka1gh8g0svrcq86k6-libdaemon-0.14" . 
> "/gnu/store/br5achyfqqgw6yzx82s5v9h7llcf7q4q-libdaemon-0.14")
>          ("/gnu/store/h4kvisn532l7ndqniqnj30yd26vksasq-dbus-1.14.0" . 
> "/gnu/store/hjc4rdifbl890j03xy2gsa7y2sqcg0mi-dbus-1.14.0")
>          ("/gnu/store/fw1wywd34vh33l4dq182ds5d7jdz45j5-expat-2.5.0" . 
> "/gnu/store/94rdaacvsqf05zhw88w92y8bkvgxdfpl-expat-2.5.0")
> -        ("/gnu/store/36my0g0j72b3vbz0gj1l8f0lmmgfkv3w-glib-2.72.3" . 
> "/gnu/store/m26kdkgr4c09wc0djn2pgcz9jl7j2rw1-glib-2.72.3")
>          ("/gnu/store/sjy64dvx18yc5p29zywmg01k3g53p643-libcap-2.64" . 
> "/gnu/store/ba5ri728kpa5fv314fav2id0nc3l0hsk-libcap-2.64")
>          ("/gnu/store/9vw5slrffp27rzy2i2plnw7xfqjyk7m4-bash-minimal-5.1.16" . 
> "/gnu/store/5mzqf6fz9bz30ybgx7jrqw424qbg9rbk-bash-minimal-5.1.16")))
>        (map

It can be reproduced like so by computing the grafting derivation of
avahi.

The “right” one:

--8<---------------cut here---------------start------------->8---
$ setarch -R guix time-machine -q  --commit=0ff72d105 -- build avahi -d
/gnu/store/fy39r2y8dg2ycdzvnbqyfd1kpandnpxb-avahi-0.8.drv
--8<---------------cut here---------------end--------------->8---

The “wrong” one:

--8<---------------cut here---------------start------------->8---
$ setarch -R guix time-machine -q  --commit=0ff72d105 -- build avahi -d
/gnu/store/vhj8f01bwddshnc75ar5z62ndcij4pgy-avahi-0.8.drv
--8<---------------cut here---------------end--------------->8---

Ludo’.