Hello,

I've found the cause of the problem. Our laboratory's firewall have 
bloqued the address 141.80.181.40. I've asked to unblock it and now it 
works.

Thank for you help,

Laurent

-- 
Laurent Cournède
Institut des Matériaux Jean Rouxel (IMN)
https://www.cnrs-imn.fr
2 rue de la Houssinière
BP 32229 - 44322 NANTES CEDEX 3
Tél : 02.40.37.39.06

Le 29/01/2021 à 16:42, Laurent Cournède a écrit :
> Thank you for your answer,
>
> it seem's proxy failure (are only 80 and 443 ports used for pull?). 
> When I am outside (i.e. without proxy), it's working well...
>
> The new command gives the same error:
>
> # https_proxy=http://xxxx:yyyy/ http_proxy=http://xxxx:yyyy/ guix 
> time-machine --commit=dbf4561b00263d6c0cf7f294e1a6a8bebf382b46 -- 
> time-machine --commit=6a77596cab2c173b04efff0a271a8e3972ca7499 -- help
> Mise à jour du canal « guix » depuis le dépôt Git « 
> https://git.savannah.gnu.org/git/guix.git »...
> Mise à jour du canal « guix » depuis le dépôt Git « 
> https://git.savannah.gnu.org/git/guix.git »...
> Computing Guix derivation for 'x86_64-linux'... /substitute: guix 
> substitute: warning: ci.guix.gnu.org : la connexion ? ?chou?e : 
> Connexion refus?e
> substitute:
> substitute:
> substitute:
> substitute:
> substitute:
> @ substituter-started /gnu/store/mzfkrxd4w8vqrmyrx169wj8wyw7r8i37-bash 
> substitute
> substitute:
> guix substitute: error: connect: Connexion refus?e
> @ substituter-failed /gnu/store/mzfkrxd4w8vqrmyrx169wj8wyw7r8i37-bash  
> fetching path `/gnu/store/mzfkrxd4w8vqrmyrx169wj8wyw7r8i37-bash' 
> (empty status: '')
> Backtrace:
>           13 (primitive-load 
> "/gnu/store/vkgqimg8fz7zi1dyv4j7jmlj4ml1gsqr-compute-guix-derivation")
> In ice-9/eval.scm:
>     155:9 12 (_ _)
>     159:9 11 (_ #(#(#(#(#(#(#(#(#(#(#(#(#(#<directory (guile-user) 
> 7f98428d0f?> ?) ?) ?) ?) ?) ?) ?) ?) ?) ?) ?) ?) ?))
> In ./guix/store.scm:
>   2062:24 10 (run-with-store #<store-connection 256.99 7f9840c645f0> _ 
> #:guile-for-build _ #:system _ #:target _)
>    1896:8  9 (_ _)
> In ./guix/gexp.scm:
>    258:18  8 (_ _)
>    1123:2  7 (_ _)
>     982:2  6 (_ _)
>     843:4  5 (_ _)
> In ./guix/store.scm:
>   1944:12  4 (_ #<store-connection 256.99 7f9840c645f0>)
>    1362:5  3 (map/accumulate-builds #<store-connection 256.99 
> 7f9840c645f0> _ _)
>   1373:15  2 (_ #<store-connection 256.99 7f9840c645f0> _ _)
>    719:11  1 (process-stderr #<store-connection 256.99 7f9840c645f0> _)
> In ./guix/serialization.scm:
>      80:6  0 (read-int #<input-output: file 10>)
>
> ./guix/serialization.scm:80:6: In procedure read-int:
> ERROR:
>   1. &nar-error:
>       file: #f
>       port: #<input-output: file 10>
> guix time-machine: error: You found a bug: the program 
> '/gnu/store/vkgqimg8fz7zi1dyv4j7jmlj4ml1gsqr-compute-guix-derivation'
> failed to compute the derivation for Guix (version: 
> "6a77596cab2c173b04efff0a271a8e3972ca7499"; system: "x86_64-linux";
> host version: "dbf4561b00263d6c0cf7f294e1a6a8bebf382b46"; 
> pull-version: 1).
> Please report it by email to <bug-guix@gnu.org>.
>
> All the best,
>
> Laurent
>