This datapack allows you to craft flint, from gravel! (and can also be used in conjunction with Vanilla Tweaks' flint to gravel!)
How to install:
1. Click the download button above.
2. Create a new world (or use an existing one)
3. Go to world folder (Open resource packs folder, go back to "minecraft" folder -> "saves", and find the folder of your world)
4. Put the .zip file in the "datapacks" folder.
5. Go into your world and write "/reload" in chat
How to craft:
Open your crafting table/inventory crafting, and place a piece of gravel anywhere to receive four pieces of flint!