+# simulate normal user with non-existent root-owned directories
+rm -rf rootdir/var/cache/apt/archives/
+mkdir rootdir/var/cache/apt/archives/
+addtrap 'prefix' "chmod -f -R +w $PWD/rootdir/var/cache/apt/archives || true;"
+chmod -R -w rootdir/var/cache/apt/archives
+
+echo 'Apt::Changelogs::Server "http://localhost:8080/";' > rootdir/etc/apt/apt.conf.d/changelog.conf