-echo "Removing /var/lib/apt/lists/*-stuff, dpkg-status-old and pkgcache.bin"
-rm -f $target/var/lib/apt/lists/*Packages \
- $target/var/lib/apt/lists/*Release \
- $target/var/lib/apt/lists/*Sources \
- $target/var/lib/apt/lists/*IndexDiff \
- $target/var/lib/apt/lists/*.gpg \
- $target/var/cache/apt-show-versions/* \
- $target/var/cache/debconf/templates.dat-old \
- $target/var/cache/apt/*.bin
+set +u
+if ifclass RELEASE ; then
+set -u
+ echo "Not updating package list as RELEASE class is set."
+else
+ echo "Updating package list"
+ $ROOTCMD apt-get update
+fi