From ae98bf924626863a533f5b4a2354b50df82ce0ba Mon Sep 17 00:00:00 2001
From: Jared Baur <jaredbaur@fastmail.com>
Date: Mon, 28 Jul 2025 10:35:10 -0700
Subject: [PATCH] formats.xml: fix cross compilation

`python3.pkgs` does not splice, so with a package-set setup to
cross-compile, we end up building xmltodict for the host platform. By
using `python3Packages.xmltodict` instead, we only use xmltodict for the
build platform, which is all that is needed for generating XML documents
at build-time.
---
 pkgs/pkgs-lib/formats.nix | 5 ++---
 1 file changed, 2 insertions(+), 3 deletions(-)

diff --git a/pkgs/pkgs-lib/formats.nix b/pkgs/pkgs-lib/formats.nix
index 0836519c203d..25bdbdc8a08f 100644
--- a/pkgs/pkgs-lib/formats.nix
+++ b/pkgs/pkgs-lib/formats.nix
@@ -952,14 +952,13 @@ optionalAttrs allowAliases aliases
           pkgs.callPackage (
             {
               runCommand,
-              python3,
               libxml2Python,
+              python3Packages,
             }:
             runCommand name
               {
                 nativeBuildInputs = [
-                  python3
-                  python3.pkgs.xmltodict
+                  python3Packages.xmltodict
                   libxml2Python
                 ];
                 value = builtins.toJSON value;