diff --git a/build/tools/before_install.sh b/build/tools/before_install.sh
index 88a9a733bd..8c3f9d6ab2 100755
--- a/build/tools/before_install.sh
+++ b/build/tools/before_install.sh
@@ -14,8 +14,6 @@ case $(uname -s) in
             # Show information about the repositories and priorities used.
             echo 'APT sources used:'
             $SUDO grep --no-messages '^[^#]' /etc/apt/sources.list /etc/apt/sources.list.d/* || true
-            echo 'APT preferences:'
-            $SUDO grep --no-messages '^[^#]' /etc/apt/preferences /etc/apt/preferences.d/* || true
             echo '--- End of APT files dump ---'
 
             run_apt() {