zipline recipe fix
This data pack fixes a bug that prevents the Zipline item from being crafted in the 1.2.1+1.21.8 version of the Zipline mod.
Screenshots

About this Mod
Zipline Crafting Fix for Version 1.2.1+1.21.8 (Fabric)
This data pack fixes a critical bug in the Zipline mod (version 1.2.1+1.21.8 for Fabric) that prevents the core Zipline item from being crafted.
The Problem:
A syntax error in the mod's original recipe file (data/zipline/recipes/zipline.json) caused the crafting recipe to be invalid. Specifically, the "key" object incorrectly used the full item component notation (e.g., {"item": "minecraft:gold_ingot"}) which is not supported for simple ingredient definitions in the current version.
The Solution:
This pack replaces the faulty recipe with a corrected one that uses the standard, simple ingredient format (e.g., "minecraft:gold_ingot"). The fixed recipe JSON is included below for verification.
Important Note:
This is a temporary, community-made fix. I have submitted a Pull Request (PR) to the official mod developer. If the main mod has been updated to a version that includes this fix, this data pack will no longer be necessary and can be safely removed.
Installation:
To apply the fix, place this data pack ZIP file into the datapacks folder of your specific Minecraft world save, whether in single-player or on a server. A reload or restart is required.
(Fixed Recipe JSON for reference)
{
"type": "minecraft:crafting_shaped",
"pattern": [
"g ",
"Sg"
],
"key": {
"g": "minecraft:gold_ingot",
"S": "minecraft:shears"
},
"result": {
"id": "zipline:zipline",
"count": 1
}
}
Available Versions
How to Install zipline recipe fix on Your Server
Order Server
Order a Minecraft Java server with at least 3 GB RAM (4 GB recommended).
Set datapack Loader
In the panel under "Egg", select the datapack loader and matching Minecraft version (1.21.8).
Install Mod
Open the mod browser in the dashboard and search for "zipline recipe fix". Click "Install" – done! Alternatively, upload the .jar via SFTP to the /mods folder.
Compatibility
Mod Loaders
Minecraft Versions
1.21.8
Server-side
✓ RequiredRecommended RAM
4 GB(min. 3 GB)Frequently Asked Questions
zipline recipe fix server crashes on startup – what to do?
Most common cause: wrong datapack version or insufficient RAM. Check the server log (latest.log) for "OutOfMemoryError" or "Mixin" errors. With Mado Hosting: ensure at least 3 GB RAM is allocated and the loader matches the mod version (1.21.8). You can switch loaders with one click in the panel.
Is zipline recipe fix compatible with datapack and fabric?
zipline recipe fix officially supports datapack, fabric for Minecraft 1.21.8. The Mado dashboard automatically detects incompatible loader combinations.
Server lagging with zipline recipe fix – how to optimize performance?
Recommended RAM: 4 GB (per 8 players). Use /spark profiler to check if zipline recipe fix consumes the most tick time. Common fixes: reduce server view-distance to 8-10, install "performant" or "starlight" as supplementary mods on Forge. With Mado Hosting, your server runs on NVMe SSDs with dedicated CPU cores for minimal latency.
Rent Modded Server
Install zipline recipe fix with just one click on your server.