error: unable to download 'https://pkg-config.freedesktop.org/releases/pkg-config-0.29.2.tar.gz': HTTP error 200 (curl error: Failure when receiving data from the peer); retrying from offset 1911963 in 303 ms
error: hash mismatch in fixed-output derivation '/nix/store/d1simrxi41d15h88m043y00yd400fpd4-cb41cbfe717e4c00d7bb70035cda5ee5f0ff9341.tar.gz.drv':
         specified: sha256-MRuqq3TKcfIahtUWdhAcYhqDiGPkAjS8UTMsDE+/jGU=
            got:    sha256-lXtfWoZ+q/FvoOqPEcuw6VCpcGl7lQnaGC5dFZ3PpI8=

error: Cannot build '/nix/store/dhpvfy772qdp7sqmgrmac8wzxb84bchh-stage0-posix-1.9.1-source.drv'.
       Reason: builder failed with exit code 1.
       Output paths:
         /nix/store/4f7nm8dblrdy74gmsl62b25rjrh4jcz3-stage0-posix-1.9.1-source
       Last 20 log lines:
       > error: executing '#
       >        #
       >        # Neither your store nor your substituters seems to have:
       >        #
       >        #  /1rz4g4znpzjwh1xymhjpm42vipw92pr73vdgl6xs1hycac8kf2n9
       >        #
       >        # You can create this path from an already-bootstrapped nixpkgs
       >        # using the following command:
       >        #
       >        #   nix-build '<nixpkgs>' -A make-minimal-bootstrap-sources
       >        #
       >        # Or, if you prefer, you can create this file using only `git`,
       >        # `nix`, and `xz`.  For the commands needed in order to do this,
       >        # see `make-bootstrap-sources.nix`.  Once you have the manual
       >        # result, do:
       >        #
       >        #   nix-store --add-fixed --recursive sha256 ./stage0-posix-1.9.1-source
       >        #
       >        # to add it to your store.
       >        ': No such file or directory
       For full logs, run:
         nix log /nix/store/dhpvfy772qdp7sqmgrmac8wzxb84bchh-stage0-posix-1.9.1-source.drv

error: Cannot build '/nix/store/w5cpkahs6ch7gwv9fip2m36hqgwgjcia-catalog.xml.drv'.
       Reason: builder failed with exit code 1.
       Output paths:
         /nix/store/2crhfrb8pqy61d32jaajpw33jjmny6xz-catalog.xml
       Last 17 log lines:
       >
       > trying https://docbook.org/xml/4.2/catalog.xml
       >   % Total    % Received % Xferd  Average Speed  Time    Time    Time   Current
       >                                  Dload  Upload  Total   Spent   Left   Speed
       >   0      0   0      0   0      0      0      0                              0
       > curl: (22) The requested URL returned error: 404
       > Warning: Problem (retrying all errors). Will retry in 1 second. 3 retries left.
       >   0      0   0      0   0      0      0      0                              0
       > curl: (22) The requested URL returned error: 404
       > Warning: Problem (retrying all errors). Will retry in 2 seconds. 2 retries
       > Warning: left.
       >   0      0   0      0   0      0      0      0                              0
       > curl: (22) The requested URL returned error: 404
       > Warning: Problem (retrying all errors). Will retry in 4 seconds. 1 retry left.
       >   0      0   0      0   0      0      0      0                              0
       > curl: (22) The requested URL returned error: 404
       > error: cannot download catalog.xml from any mirror
       For full logs, run:
         nix log /nix/store/w5cpkahs6ch7gwv9fip2m36hqgwgjcia-catalog.xml.drv
error: Cannot build '/nix/store/sa1p1cipazcjaam1h8018p271wpidhk4-docbook-xml-4.1.2.drv'.
       Reason: 1 dependency failed.
       Output paths:
         /nix/store/d7kjnk1bhpqcpxj64qhm23wyffhrvqsv-docbook-xml-4.1.2

error: Cannot build '/nix/store/2kbbzfsz1hzd21yj0h989s3z40cgrp58-stage0-posix-1.9.1-source.drv'.
       Reason: builder failed with exit code 1.
       Output paths:
         /nix/store/4f7nm8dblrdy74gmsl62b25rjrh4jcz3-stage0-posix-1.9.1-source
       Last 20 log lines:
       > error: executing '#
       >        #
       >        # Neither your store nor your substituters seems to have:
       >        #
       >        #  /1rz4g4znpzjwh1xymhjpm42vipw92pr73vdgl6xs1hycac8kf2n9
       >        #
       >        # You can create this path from an already-bootstrapped nixpkgs
       >        # using the following command:
       >        #
       >        #   nix-build '<nixpkgs>' -A make-minimal-bootstrap-sources
       >        #
       >        # Or, if you prefer, you can create this file using only `git`,
       >        # `nix`, and `xz`.  For the commands needed in order to do this,
       >        # see `make-bootstrap-sources.nix`.  Once you have the manual
       >        # result, do:
       >        #
       >        #   nix-store --add-fixed --recursive sha256 ./stage0-posix-1.9.1-source
       >        #
       >        # to add it to your store.
       >        ': No such file or directory
       For full logs, run:
         nix log /nix/store/2kbbzfsz1hzd21yj0h989s3z40cgrp58-stage0-posix-1.9.1-source.drv

Quand je reçois des erreurs bizarres, je vérifie que le Nix store n'a pas de corruption :

nix-store --verify --check-contents --repair

Ça prendra un bon moment parce-qu'il faut que ça traverse tout le Nix store, mais en attendant tu peux chercher d'autres solutions ou faire autre chose.

Si cette commande trouve quelque-chose, après il faut réessayer ce qui ne marchait pas et chercher d'où vient la corruption (en mon cas, la dernière fois était due à une alimentation insuffisante).

pinage404: Tu as cette erreur pour deux raisons:

1. tu n'accèdes pas au binary cache cache.nixos.org qui contient bien ce que tu cherches:

curl https://cache.nixos.org/2crhfrb8pqy61d32jaajpw33jjmny6xz.narinfo
StorePath: /nix/store/2crhfrb8pqy61d32jaajpw33jjmny6xz-catalog.xml

1. Le fichier que tu souhaites n'existe plus:

curl -I https://docbook.org/xml/4.2/catalog.xml
HTTP/2 404 

Il faut donc que tu regardes pourquoi tu n'accèdes pas au binary cache. Tu peux essayer de reproduire avec curl https://cache.nixos.org/2crhfrb8pqy61d32jaajpw33jjmny6xz.narinfo. Tu peux également regarder ce que tu as comme substituters dans le fichier /etc/nix/nix.conf.

nix-store --verify --check-contents --repair
reading the Nix store...
checking path existence...
checking link hashes...
checking store hashes...

# WARNING: this file is generated from the nix.* options in
# your NixOS configuration, typically
# /etc/nixos/configuration.nix.  Do not edit it!
allowed-users = *
auto-optimise-store = false
builders = 
builders-use-substitutes = true
cores = 0
experimental-features = nix-command flakes
max-free = 5G
max-jobs = auto
min-free = 100M
require-sigs = true
sandbox = true
sandbox-fallback = false
substituters = https://handy-computer.cachix.org https://cache.nixos.org/
system-features = nixos-test benchmark big-parallel kvm
trusted-public-keys = cache.nixos.org-1:6NCHdD59X431o0gWypbMrAURkbJ16ZPMQFGspcDShjY= cache.nixos.org-1:6NCHdD59X431o0gWypbMrAURkbJ16ZPMQFGspcDShjY= nix-community.cachix.org-1:mB9FSh9qf2dCimDSUo8Zy7bkq5CX+/rkCWyvRCYg3Fs= numtide.cachix.org-1:2ps1kLBUWjxIneOy1Ik6cQjb41X0iXVXeHigGmycPPE= cache.garnix.io:CTFPyKSLcx5RMJKfLo5EEPUObbA78b0YQ2DTCJXqr9g= nix-on-droid.cachix.org-1:56snoMJTXmDRC1Ei24CmKoUqvHJ9XCp+nidK7qkMQrU= handy-computer.cachix.org-1:Sihzctn6DC0CJM5QeL+9nBEL3CL8c33m777C+eIv748= pinage404-nix-sandboxes.cachix.org-1:5zGRK2Ou+C27E7AdlYo/s4pow/w39afir+KRz9iWsZA= git-gamble.cachix.org-1:afbVJAcYMKSs3//uXw3HFdyKLV66/KvI4sjehkdMM/I= pinage404.cachix.org-1:pHeqko9YZ1p49z4pn/UbI7KBIlbHBLENRmZHuC8gQD0=
trusted-substituters = https://cache.nixos.org https://nix-community.cachix.org https://numtide.cachix.org https://cache.garnix.io https://nix-on-droid.cachix.org https://handy-computer.cachix.org https://pinage404-nix-sandboxes.cachix.org https://git-gamble.cachix.org https://pinage404.cachix.org
trusted-users = root @wheel
warn-large-path-threshold = 2M
extra-platforms = armv6l-linux armv7l-linux aarch64-linux i686-linux i686-windows x86_64-windows i686-linux
extra-sandbox-paths = /run/binfmt /nix/store/nilkcchyj1l9ix3ww4p1fby7v00dwkpc-bash-interactive-5.3p3 /nix/store/3a47xyilailqh6mg6lr7ya0m8gvdbb7c-qemu-arm-binfmt-P /nix/store/3a47xyilailqh6mg6lr7ya0m8gvdbb7c-qemu-arm-binfmt-P /nix/store/6niw0jwxnbw751fgyd7pz7l8ld9skggi-qemu-aarch64-binfmt-P /nix/store/6fik6n206lih0dz024x02zw1vy04xxdl-exec /nix/store/yw5s13syb5bnnbhvqljf8pmm25276s8y-wine-10.0 /nix/store/mbk5205iyn04hq9angp4zdd76zj3dig5-wine64-10.0
extra-experimental-features = nix-command flakes

• nix.settings.substituters

• nix.settings.trusted-substituters

• nix.settings.trusted-public-keys

https://nix.dev/manual/nix/2.28/command-ref/conf-file.html?highlight=substituters#file-format

A configuration setting usually overrides any previous value. However, for settings that take a list of items, you can prefix the name of the setting by extra- to append to the previous value.

donc quand je veux des trucs en premier je les met dans x, et quand je les veux après dans extra-x

et pour la différence entre substituters et trusted-substituters, si je comprends bien, c’est que trusted-substituters est utilisable par n’importe quel user, mais substituters uniquement par un trusted-user:
https://nix.dev/manual/nix/2.28/command-ref/conf-file.html#conf-substituters

At least one of the following conditions must be met for Nix to use a substituter:

• The substituter is in the trusted-substituters list
• The user calling Nix is in the trusted-users list

In addition, each store path should be trusted as described in trusted-public-keys

C'est soit l'un ou l'autre. Il n'est pas nécessaire que l'utilisateur soit dans trusted-users pour qu'il/elle puisse utiliser un substituteur dans trusted-substituters.
Le deuxième cas est pour les commandes qui modifient --option substituters.

Ce qui est important, c'est qu'il faut être privilégié par l'une des deux conditions afin d'ajouter des outputs au Nix store sans faire le build.
Sinon, n'importe-qui pourrait y ajouter des outputs qui ne correspondent pas à la dérivation d'origine (par malice ou par négligence).