busybox awk crashing

#!/bin/sh

packages() {
    awk -f - -- "$@" << EOF
BEGIN       { FS = ": " }
/^Package:/ { pkg = \$2 }
/^Version:/ { version = \$2 }
/^\$/       { print(pkg, version) }
EOF
}

CSSU_LISTS="/var/lib/apt/lists/repository.maemo.org_community_*_Packages /var/lib/apt/lists/repository.maemo.org_community-testing_*_Packages /var/lib/apt/lists/maemo.merlin1991.at_cssu_community-devel_*_Packages /var/lib/apt/lists/maemo.merlin1991.at_cssu_community-thumb_*_Packages"

rm -f /var/tmp/cssu-packages
touch /var/tmp/cssu-packages
rm -f /var/tmp/cssu-lists
touch /var/tmp/cssu-lists
for file in $CSSU_LISTS; do
    if ! test -f $file; then continue; fi
    echo $file >> /var/tmp/cssu-lists
    sed -n 's/Package: //p' $file >> /var/tmp/cssu-packages
done
sort -u /var/tmp/cssu-packages > /var/tmp/cssu-packages.new
mv /var/tmp/cssu-packages.new /var/tmp/cssu-packages

rm -f /var/tmp/version-packages
touch /var/tmp/version-packages
for file in /var/lib/apt/lists/*_Packages; do
    if ! test -f $file; then continue; fi
    if grep -q "^$file\$" /var/tmp/cssu-lists; then continue; fi
    packages $file >> /var/tmp/version-packages
done
sort -u /var/tmp/version-packages > /var/tmp/version-packages.new
mv /var/tmp/version-packages.new /var/tmp/version-packages

rm -f /var/tmp/install-packages
touch /var/tmp/install-packages
rm -f /var/tmp/remove-packages
touch /var/tmp/remove-packages
while read package; do
    max=0
    for version in $(grep "^$package " /var/tmp/version-packages | sed 's/.* //'); do
        if dpkg --compare-versions $max lt $version 1>/dev/null 2>&1; then
            max=$version
        fi
    done
    if test "$max" = "0"; then
        echo "$package" >> /var/tmp/remove-packages
    else
        echo "$package=$max" >> /var/tmp/install-packages
    fi
done < /var/tmp/cssu-packages

echo "Remove packages:"
cat /var/tmp/remove-packages
echo

echo "Install packages:"
cat /var/tmp/install-packages
echo

echo "Remove metapackage:"
echo "mp-fremantle-community-pr"
echo

meta=mp-fremantle-generic-pr
for num in 002 003 004 203 204 205 206 207 208 210; do
    if dpkg -l "*-$num" 2>/dev/null | grep -q "^ii"; then
        meta=mp-fremantle-$num-pr
        break
    fi
done

echo "Install metapackage:"
echo $meta
echo