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Packwiz Modpacks

packwiz is a CLI tool for maintaining and providing modpack definitions, with support for both CurseForge and Modrinth as sources. See the packwiz tutorial for more information.

To configure server mods using a packwiz modpack, set the PACKWIZ_URL environment variable to the location of your pack.toml modpack definition:

docker run -d -v /path/on/host:/data -e TYPE=FABRIC \
    -e "PACKWIZ_URL=" \

packwiz modpack definitions are processed before other mod definitions (MODPACK, MODS, etc.) to allow for additional processing/overrides you may want to perform (in case of mods not available via Modrinth/CurseForge, or you do not maintain the pack).


packwiz is pre-configured to only download server mods. If client-side mods are downloaded and cause issues, check your pack.toml configuration, and make sure any client-only mods are not set to "both", but rather "client" for the side configuration item.