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-rw-r--r--gnu/packages/qt.scm1
1 files changed, 1 insertions, 0 deletions
diff --git a/gnu/packages/qt.scm b/gnu/packages/qt.scm
index 47a7caae48..fb242a01da 100644
--- a/gnu/packages/qt.scm
+++ b/gnu/packages/qt.scm
@@ -568,6 +568,7 @@ developers using C++ or QML, a CSS & JavaScript like language.")
                #t)))
             (add-before 'check 'set-display
               (lambda _
+                ;; make Qt render "offscreen", required for tests
                 (setenv "QT_QPA_PLATFORM" "offscreen")
                 #t)))))))