CurseForge · Minecraft mod
Scalar Legacy
The Scala 2.11.x provider for Cleanroom
Quick answer
Which Scalar Legacy release should I use?
Scalar Legacy-1.0.1.jar targets 1.12.2 with Forge. The project page does not say whether this file belongs on the client, dedicated server, or both. No extra mods listed for this file.
Where it goes
Is Scalar Legacy required on the client, server, or both?
The project page does not say whether this file belongs on the client, dedicated server, or both.
The source does not explicitly classify this release as client-only or server-only.
What else does Scalar Legacy-1.0.1.jar need?
Scalar Legacy-1.0.1.jar. Change the file and its required mods may change too.
This file does not list any required mods. Do not add a library just because a different file uses it.
This file does not list any required or optional mods.
Before you install it
Add Scalar Legacy without breaking your instance.
Built for Scalar Legacy-1.0.1.jar. Pick another file and the loader, install side or required mods may change.
- 01
Stick to this file
Use Scalar Legacy-1.0.1.jar. It targets 1.12.2 with Forge; another release may have different loader, side or dependency requirements.
- 02
Bring the mods it needs
This file does not list any required mods. Do not add a library just because a different file uses it.
- 03
Put it on the correct side
The project page does not say whether this file belongs on the client, dedicated server, or both.
- 04
Pick the file you checked
Use the “Get this file” button beside Scalar Legacy-1.0.1.jar. It opens that exact file at the source.
About this project
What does Scalar Legacy add?
Scalar is a Scala language provider for Cleanroom. It provides Scala 2.11 library for legacy Forge mods.
In 1.12.2, Forge ships a set of seriously outdated Scala libraries. These libraries are removed in Cleanroomm and bundled into this independent mod.
To run legacy mods developed in Scala (OpenComputer, ProjectRed) on Cleanroom, this mod is necessary.
FAQ:
- Q: What is Cleanroom?
- A: Cleanroom is a 1.12.2 Forge fork, providing faster launch speed, newer toolchain, new APIs and 99% compatibility. Our plan is to make 1.12.2 up-to-date with latest toolchain while adding more feature to Forge & vanilla, so we don't need to care about higher versions' X point release * Y Mod API headache.
- Q: How to install Cleanroom?
- A: Please follow the instructions in README.
- Q: Can I include this in my Forge modpack? Will it crash my Forge pack?
- A: Yes, you can, and it is safe! This mod won't be loaded or crash anything in a Forge environment.
- Q: Why make another project?
- A: Putting Scala 3 provider and Scala 2 provider in same project keep producing confusion and unnecessary crash reports.
- Q: Why not just include Scala in the loader?
- A: Scala 2.11 is deprecated and can't be compiled against under Java 21+. Our goal is not only providing a runtime but also latest development toolchain, so switching to Scala 3 is important. Make Scala become standalone mods is the only solution here.
Note: mod files marked as "Forge" because CurseForge doesn't support Cleanroom yet.
Project description from CurseForge.
Pick your setup
Scalar Legacy by Minecraft version and loader
Choose the version and loader you play, then open the matching release.
Check the dependencies, then try the file in a copied instance before changing a world you care about.
Recent files
Scalar Legacy versions and loaders
Scalar Legacy-1.0.1.jar
3 Aug 2025
scalar-1.0.0.jar
4 Apr 2025
Looking for an older file? The official CurseForge project page is in Resources.