the link takes you to the 1.7.1 version tho , not the dev version
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Posted link is dev version. I think developer will change displayed version, when update is ready. if you don't believe me, go to nurse room, where your character give birth. You will see inactive button "bounty board". or just look at Eliza, she now wear lab coat.
To get access to it you need to get several strange pill and shown them to Eliza. To get them win fights with inmates. drop rate is low, but you can cheat. Activate rollback option in options menu, rollback drop screen, until you get pill in drops.
I was wrong, to acces to it, you need to talk to Eliza, and ask to become lab assistant. You need pills later to advance your character in your new role. This is also will get you access to lab, where you later will create TF items, painkilles and some others drugs. Each items have cost in cum, milk and girlcum. So you may start collect and store that liquids for upcoming update. To upgrade lab and learn new you need science points. You get them doing stuff from bounty board or delving dungeon rogue-like style. Eliza will show entrance to it, when you progress lab assistant story.
And reading last commit from github. Mods now can have inbuild datapacks. User datapacks have priority over inbuild in mods.