gnu: python-dnspython: Only include supported inputs.

* gnu/packages/python-xyz.scm (python-dnspython)[propagated-inputs]:
Only include packages when they are supported on the architecture.

Change-Id: I19acb435b11070ee55c6b878019e1ee8532063b7

gnu/packages/python-xyz.scm

@@ -14,7 +14,7 @@
 ;;; Copyright © 2015, 2016, 2017, 2019, 2022 Leo Famulari <leo@famulari.name>
 ;;; Copyright © 2015, 2017 Ben Woodcroft <donttrustben@gmail.com>
 ;;; Copyright © 2015, 2016 Erik Edrosa <erik.edrosa@gmail.com>
-;;; Copyright © 2015-2024 Efraim Flashner <efraim@flashner.co.il>
+;;; Copyright © 2015-2025 Efraim Flashner <efraim@flashner.co.il>
 ;;; Copyright © 2015, 2017, 2020 Kyle Meyer <kyle@kyleam.com>
 ;;; Copyright © 2015, 2016 Chris Marusich <cmmarusich@gmail.com>
 ;;; Copyright © 2016 Danny Milosavljevic <dannym+a@scratchpost.org>
@@ -23191,13 +23191,24 @@ until the object is actually required, and caches the result of said call.")
      (list python-hatchling
            python-pytest))
     (propagated-inputs
-     (list python-cryptography
-           python-aioquic
-           python-h2
-           python-httpcore
-           python-httpx
-           python-idna
-           python-trio))
+     ;; According to pyproject.toml all these are technically optional.
+     (append
+       (let ((if-supported
+               (lambda (package)
+                 (if (and (not (%current-target-system))
+                          (member (%current-system)
+                                  (package-transitive-supported-systems package)))
+                     (list package)
+                     '()))))
+         ;; DNSSEC
+         (if-supported python-cryptography)
+         ;; DNS over HTTPS
+         (if-supported python-h2)
+         (if-supported python-httpcore)
+         (if-supported python-httpx)
+         ;; DNS over Quic
+         (if-supported python-trio))
+       (list python-idna)))
     (home-page "https://www.dnspython.org")
     (synopsis "DNS toolkit for Python")
     (description