_Originally created by @intrigeri on [#12453 (Redmine)](https://public-redmine-archive.tails.boum.org/code/issues/12453)_ Symptoms: https://gitlab.tails.boum.org/tails/tails/-/issues/11983#note_48288. Once I’ve made isohybrid more verbose I saw “isohybrid: invalid id: \`’1490015021’’”. So passing `--id $SOURCE_DATE_EPOCH` to isohybrid made the ISO reproducible… because it’s an invalid ID and so we stopped hybriding the ISO. Feature Branch: feature/5630-deterministic-builds Parent Task: tails/tails#5630