About FermiumBooter
From ModrinthSimplistic mixin mod utility to allow developers to load mixins both early and late
FermiumBooter is a mixin mod utility to allow developers to load mixins both early and late, allowing for modifying classes that normally could not be modified otherwise.
Current features include;
- Enqueue mixins to be applied both early and late, to allow for for modifying Vanilla/Forge classes, as well as mod classes
- @MixinConfig annotation system to expand on the Forge @Config system, to allow for automatic mixin enqueue based on config toggles
- Optional compatibility handling through the config annotation system to allow developers to define required/incompatible mods for specific mixins
- Logged warnings when a mixin using the config annotation system fails compatibility checks
- Optional forced mixin disabling when a mixin using the config annotation system fails compatibility checks
- Ingame (disable-able) warning rendering when mixins using the config annotation system fail compatibility checks
- Enable/disable enqueued mixins prior to application through the use of a Supplier, to allow developer control over optional mixins
- Utility method to check if a ModID is present similar to Loader.isModLoaded() however usable during mixin enqueue/early mixin application unlike Loader.isModLoaded()
- Disallow other FermiumBooter enqueued mixins from applying, for testing or tweaking purposes
- Shadows Mixin 0.8.7 and MixinExtras 0.4.1
For developer usage:
In your IFMLLoadingPlugin init, instead of "Mixins.addConfiguration("mixinConfigName")", use "FermiumRegistryAPI.enqueueMixin("mixinConfigName"). If you are registering it as a late-loaded mixin use "FermiumRegistryAPI.enqueueMixin(true, "mixinConfigName")". That is all that is required, and FermiumBooter takes care of the rest. For additional utilities as described previously, all are documented in code with explanations of usage and purpose.
If you have any issues/suggestions/requests, please post them to the Github issue tracker linked above.
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Highlights
From source dataGame versions
Built for Minecraft 1.12.2.
Loaders
Runs on Forge.
Footprint
Rated a light load on a server.
FermiumBooter on Nxeon
From our catalogue- One-click install
- Supported on Nxeon Minecraft servers. We download it from Modrinth, place it, and restart the server.
- Server side
- Optional on the server
- Server type needed
- Forge
- Server load
- light
- Smallest plan we suggest
- Minecraft — 2 GB (2 GB RAM). This follows our own load rating above, not a benchmark.
- Latest build
- 1.6.3, released 2026-10-24
Game versions by loader
| Loader | Game versions | Newest |
|---|---|---|
| Forge | 1.12.2 | 1.12.2 |
From 10 recorded builds of FermiumBooter.
Recent builds
| Build | Released | Game versions | Loaders |
|---|---|---|---|
| 1.6.3 | 2026-10-24 | 1.12.2 | Forge |
| 1.6.2 | 2026-10-22 | 1.12.2 | Forge |
| 1.6.1 | 2026-10-21 | 1.12.2 | Forge |
| 1.6.0 | 2026-10-20 | 1.12.2 | Forge |
| 1.5.3 | 2026-10-11 | 1.12.2 | Forge |
| 1.4.1 | 2025-11-21 | 1.12.2 | Forge |
Run FermiumBooter on a Minecraft server
Pick a server or deploy a new one above; it is installed in one click.
What kind of mod it is
From the catalogQuality of life & UI
Small conveniences, tweaks and interface improvements players notice straight away.
Works on a server
From source side supportModrinth lists server-side support for FermiumBooter as optional: it can run on a server, but isn’t required there.
Compatibility
- Game
- Minecraft
- Loaders
- Forge
- Runs on
- Serveroptional on the server
- Game versions
- 1.12.2
Verified at the source
- ✓ModrinthOfficial listing, checked 2026-10-25Open ↗
- ✓Authorfonnymunkey, as published on Modrinth
- ✓LicenseLGPL-3.0-or-laterFree











