Error running NeoForge on Yarn post locator rework

[Su5eD]

NeoForge 20.6.14-beta and later (mapped to Yarn) will no longer launch using ArchLoom as a result of a complete rework of Neo's mod locator system. However, the game runs fine when using Mojang mappings.

Logs

https://gist.github.com/Su5eD/d86c8b756c80e6216b05abb1f814a787

Steps to reproduce

1. Download my minimal reproduction project file: Archloom-1.20.1-neoforge-repro.zip
2. Import into preferred IDE using traditional methods
3. Attempt to launch the game via gradle's runClient task
4. Observe the game crashing, as it is seemingly unable to find Minecraft on the system classpath