bug#53904: Using an http proxy, derivation failed

[dal-blazej]

Hi,

I am trying to get Guix in a QubesOS/debian 11 template.  QubesOS expose a proxy
in its templates, used mostly by apt and dnf.

For some reason all my attempts to modify the systemd unit were
un-successful so I simply exported it on the command line. However as
you can see in the following backtrace, that is not working as expected.

$ export https_proxy=http://localhost:8082/ ; guix pull
hint: Consider installing the `glibc-locales' package and defining 
`GUIX_LOCPATH', along these lines:

     guix install glibc-locales
     export GUIX_LOCPATH="$HOME/.guix-profile/lib/locale"

See the "Application Setup" section in the manual, for more info.

Updating channel 'guix' from Git repository at 
'https://git.savannah.gnu.org/git/guix.git'...
Building from this channel:
  guix      https://git.savannah.gnu.org/git/guix.git   515406f
Computing Guix derivation for 'x86_64-linux'... \substitute: hint: Consider 
installing the `glibc-utf8-locales' or `glibc-locales' package and
substitute: defining `GUIX_LOCPATH', along these lines:
substitute: 
substitute:      guix install glibc-utf8-locales
substitute:      export GUIX_LOCPATH="$HOME/.guix-profile/lib/locale"
substitute: 
substitute: See the "Application Setup" section in the manual, for more info.
substitute: 
hint: Consider installing the `glibc-utf8-locales' or `glibc-locales' package 
and
defining `GUIX_LOCPATH', along these lines:

     guix install glibc-utf8-locales
     export GUIX_LOCPATH="$HOME/.guix-profile/lib/locale"

See the "Application Setup" section in the manual, for more info.

guix substitute: error: host name lookup error: Name or service not known
Backtrace:
          14 (primitive-load 
"/gnu/store/m8ipcivlnaqr4y9hpxiiqi2pn1wldcia-compute-guix-derivation")
In ice-9/eval.scm:
    155:9 13 (_ _)
    159:9 12 (_ #(#(#(#(#(#(#(#(#(#(#(#(#(#(#(#(#<directory (guile-u?> ?) ?) ?) 
?) ?) ?) ?) ?) ?) ?) ?) ?) ?) ?) ?) ?))
In ice-9/boot-9.scm:
    152:2 11 (with-fluid* _ _ _)
    152:2 10 (with-fluid* _ _ _)
In ./guix/store.scm:
  2129:24  9 (run-with-store #<store-connection 256.99 7400779ab140> 
#<procedure 740061d42d20 at ./guix/self.scm:12?> ?)
   1966:8  8 (_ #<store-connection 256.99 7400779ab140>)
In ./guix/gexp.scm:
   296:22  7 (_ #<store-connection 256.99 7400779ab140>)
   1180:2  6 (_ #<store-connection 256.99 7400779ab140>)
   1046:2  5 (_ #<store-connection 256.99 7400779ab140>)
    892:4  4 (_ #<store-connection 256.99 7400779ab140>)
In ./guix/store.scm:
  2014:12  3 (_ #<store-connection 256.99 7400779ab140>)
   1406:5  2 (map/accumulate-builds #<store-connection 256.99 7400779ab140> 
#<procedure 740072c0d640 at ./guix/stor?> ?)
  1421:15  1 (_ #<store-connection 256.99 7400779ab140> 
("/gnu/store/gmi62pbnf0jfish26chd7pvfzs2rzlxa-guile-ssh-?" ?) ?)
  1421:15  0 (loop #f)

./guix/store.scm:1421:15: In procedure loop:
ERROR:
  1. &store-protocol-error:
      message: "some substitutes for the outputs of derivation 
`/gnu/store/ak595vg1ij7vf3vxx3srk60dvwz6zxry-gnutls-3.7.2.drv' failed (usually 
happens due to networking issues); try `--fallback' to build derivation from 
source "
      status: 1
guix pull: error: You found a bug: the program 
'/gnu/store/m8ipcivlnaqr4y9hpxiiqi2pn1wldcia-compute-guix-derivation'
failed to compute the derivation for Guix (version: 
"515406f20f0f2a69f8701ce3ece8121dbc4fb5dd"; system: "x86_64-linux";
host version: "4578ad78bee1dfd450962627ae66d3e15ebadad2"; pull-version: 1).
Please report the COMPLETE output above by email to <bug-guix@gnu.org>.