Subject: [bug#50201] [PATCH 49/52] gnu: gdk-pixbuf: Find docbook when cross-compiling.

From: Maxime Devos <[email-masked]>
Date: Wed, 25 Aug 2021 20:03:29 +0200

* gnu/packages/gtk.scm
  (gdk-pixbuf)[arguments]<#:phases>{patch-docbook}: Look for docbook
  in 'native-inputs' instead of 'inputs' when cross-compiling.
---
 gnu/packages/gtk.scm | 14 +++++++++++---
 1 file changed, 11 insertions(+), 3 deletions(-)

diff --git a/gnu/packages/gtk.scm b/gnu/packages/gtk.scm
index 1d6be00e60..8bf55ccf14 100644
--- a/gnu/packages/gtk.scm
+++ b/gnu/packages/gtk.scm
@@ -628,15 +628,23 @@ highlighting and other features typical of a source code editor.")
        #:phases
        (modify-phases %standard-phases
          (add-after 'unpack 'patch-docbook
-           (lambda* (#:key inputs #:allow-other-keys)
+           ;; TODO(core-updates): Unconditionally look in (or native-inputs inputs)
+           (lambda* (#:key ,@(if (%current-target-system)
+                                 '(native-inputs)
+                                 '())
+                     inputs #:allow-other-keys)
              (with-directory-excursion "docs"
                (substitute* "meson.build"
                  (("http://docbook.sourceforge.net/release/xsl/current/")
-                  (string-append (assoc-ref inputs "docbook-xsl")
+                  (string-append (assoc-ref ,(if (%current-target-system)
+                                                 '(or native-inputs inputs)
+                                                 'inputs) "docbook-xsl")
                                  "/xml/xsl/docbook-xsl-1.79.2/")))
                (substitute* (find-files "." "\\.xml$")
                  (("http://www.oasis-open.org/docbook/xml/4\\.3/")
-                  (string-append (assoc-ref inputs "docbook-xml")
+                  (string-append (assoc-ref ,(if (%current-target-system)
+                                                 '(or native-inputs inputs)
+                                                 'inputs) "docbook-xml")
                                  "/xml/dtd/docbook/"))))
              #t))
          (add-before 'configure 'disable-failing-tests
-- 
2.33.0