diff --git a/pbuilder-hooks/D05deps b/pbuilder-hooks/D05deps
index 70833e4..79a4c50 100755
--- a/pbuilder-hooks/D05deps
+++ b/pbuilder-hooks/D05deps
@@ -1,3 +1,5 @@
 #!/bin/bash -xe
+sed -i '/^deb http:/ s/$/ contrib non-free/' /etc/apt/sources.list
 echo "deb [trusted=yes] file://$DEPSBASE ./" >> /etc/apt/sources.list
+echo 'Debug::pkgProblemResolver true;' > /etc/apt/apt.conf
 apt-get update