Check the website for installation / usage instructions.

Using MonoMod, an open-source C# modding utility.

We're in the game modding category on the "Mt. Celeste Climbing Association" Discord server:

For information about mod development, check out the Everest Wiki or ask questions in the #modding_help channel on discord.

• If you just want to install Everest, go to the Everest website.
• If you've previously installed Everest and updated Celeste or switched betas / branches, delete the orig directory where Celeste is installed.
  • macOS: Right-click and browse the Celeste app in Finder, then naviagte to Contents, then MacOS.
• Clone the Everest repo, either in your IDE, via the CLI, or by downloading the .zip from GitHub.
• Restore Nuget packages either via your IDE or the command line.

• Open the .sln in the repo with Visual Studio
• Build all
• Copy everything in MiniInstaller\bin\Debug and Celeste.Mod.mm\bin\Debug to your Celeste directory
• Run MiniInstaller.exe

• Install the mono runtime
• Build all
  • With MonoDevelop: Open the .sln in the repo with MonoDevelop
  • Manually: Open the terminal in the Everest directory and run msbuild or xbuild
• Copy everything in MiniInstaller/bin/Debug and Celeste.Mod.mm/bin/Debug to your Celeste directory
  • macOS: Celeste.app/Contents/MacOS
• Run mono MiniInstaller.exe

Note: At the time of writing, no member of the Everest Team is using Nix.

• Run nix-env -f . -iA everest in the Everest repo
• Wait for it to install
• Run miniinstaller ~/Celeste, where ~/Celeste is your Celeste path.
  • miniinstaller is a wrapper over the MiniInstaller.exe in the other methods.