[PATCH core-updates] guix: cmake-build-system: Enable offscreen Qt backend for tests.

[Danny Milosavljevic]

* guix/build/cmake-build-system.scm (cmake-build-system): Set QT_QPA_PLATFORM 
to "offscreen".
---
 guix/build/cmake-build-system.scm | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/guix/build/cmake-build-system.scm 
b/guix/build/cmake-build-system.scm
index 27f2b5c87..dfe61ce56 100644
--- a/guix/build/cmake-build-system.scm
+++ b/guix/build/cmake-build-system.scm
@@ -67,6 +67,8 @@
                 #:allow-other-keys)
   (let ((gnu-check (assoc-ref gnu:%standard-phases 'check)))
     (setenv "CTEST_OUTPUT_ON_FAILURE" "1")
+    ;; Automated tests can't access user's X session anyway
+    (setenv "QT_QPA_PLATFORM" "offscreen")
     (gnu-check #:tests? tests? #:test-target test-target
               #:parallel-tests? parallel-tests?)))