self: super: { minecraft = let version = "2.2.2012"; in super.minecraft.overrideAttrs (old: { inherit version; src = self.fetchurl { url = "https://launcher.mojang.com/download/linux/x86_64/minecraft-launcher_${version}.tar.gz"; sha256 = "sha256-er+g/0pqsS5mDcZ5ID9kATuF3RwDQThue1mc/XRVms8="; }; }); }