- Only for 1.2.
- Only on x86_64.
Download the zip archive from kerbalspaceprogram.com and install it into the Nix store with:
nix-prefetch-url file:///path/to/ksp-linux-1-2.zip
If necessary, modify default.nix with the right sha256 hash.
Build with:
nix-build default.nix
or install with:
nix-env -f default.nix -i ksp-linux
Now you have KSP in the store, and KSP.x86_64 will run, but the store is read-only and KSP doesn't like that. So, copy everything into a local tree:
cp -r /nix/store/<hash>-ksp-linux-1.0.4/KSP_linux /path/to/games
chmod -R ug+w /path/to/games/KSP_linux
Go ahead and run it:
/path/to/games/KSP_linux/KSP.x86_64
The default.nix expression makes sure that the binary is linked with the right libraries. Installing it via nix-env means that those libraries won't disappear when the system is upgraded, and that if KSP works once, an upgrade won't trash those old, working libraries.