Ignore expired package releases.

install.sh

@@ -9,11 +9,8 @@ deb http://snapshot.debian.org/archive/debian/${DATE}/ bullseye main
 deb http://snapshot.debian.org/archive/debian/${DATE}/ bullseye-updates main
 EOF
 
-# ignore expired package releases if env variable is set
-if [[ "${IGNORE_EXPIRY}" = "1" ]]
-then
-    echo 'Acquire::Check-Valid-Until "0";' >> /etc/apt/apt.conf.d/10-ignore-expiry
-fi
+# ignore expired package releases so we can reproduce from old snapshots
+echo 'Acquire::Check-Valid-Until "0";' >> /etc/apt/apt.conf.d/10-ignore-expiry
 
 # update package sources
 apt-get update