Firejail to sandbox online games

profiles/personal/configuration.nix

@@ -11,6 +11,7 @@
       ( import ../../system/app/docker.nix {storageDriver = "btrfs"; inherit username pkgs config lib;} )
       ../../system/app/gamemode.nix
       ../../system/app/steam.nix
+      ../../system/app/prismlauncher.nix
       ../../system/security/doas.nix
       ../../system/security/gpg.nix
       ../../system/security/blocklist.nix

profiles/work/configuration.nix

@@ -16,6 +16,7 @@
       ../../system/security/gpg.nix
       ../../system/security/blocklist.nix
       ../../system/security/firewall.nix
+      ../../system/security/firejail.nix
       ../../system/security/openvpn.nix
       ../../system/style/stylix.nix
     ];

system/app/prismlauncher.nix

@@ -0,0 +1,5 @@
+{ config, lib, pkgs, ... }:
+
+{
+  environment.systemPackages = [ pkgs.prismlauncher ];
+}

system/app/steam.nix

@@ -3,4 +3,5 @@
 {
   hardware.opengl.driSupport32Bit = true;
   programs.steam.enable = true;
+  environment.systemPackages = [ pkgs.steam ];
 }

system/security/firejail-profiles/prismlauncher.profile

@@ -0,0 +1,51 @@
+# Firejail profile for prismlauncher
+# Description: An Open Source Minecraft launcher that can manage multiple instances
+# This file is overwritten after every install/update
+# Persistent global definitions
+include globals.local
+
+ignore noexec ${HOME}
+
+noblacklist ${HOME}/.local/share/PrismLauncher
+
+include allow-java.inc
+
+include disable-common.inc
+include disable-devel.inc
+include disable-interpreters.inc
+include disable-programs.inc
+include disable-shell.inc
+include disable-xdg.inc
+
+mkdir ${HOME}/.local/share/PrismLauncher
+whitelist ${HOME}/.local/share/PrismLauncher
+include whitelist-common.inc
+include whitelist-runuser-common.inc
+include whitelist-usr-share-common.inc
+include whitelist-var-common.inc
+
+caps.drop all
+netfilter
+nodvd
+nogroups
+noinput
+nonewprivs
+noroot
+notv
+nou2f
+novideo
+protocol unix,inet,inet6,netlink
+seccomp
+tracelog
+
+disable-mnt
+private-bin java,java-config,minecraft-launcher,prismlauncher
+private-cache
+private-dev
+# If multiplayer or realms break, add 'private-etc <your-own-java-folder-from-/etc>'
+# or 'ignore private-etc' to your minecraft-launcher.local.
+private-tmp
+
+dbus-system none
+
+restrict-namespaces

system/security/firejail.nix

@@ -0,0 +1,20 @@
+{ config, lib, pkgs, ... }:
+
+{
+  environment.systemPackages = with pkgs; [ firejail ];
+  programs.firejail.enable = true;
+  programs.firejail.wrappedBinaries = {
+    prismlauncher = {
+      executable = "${pkgs.prismlauncher}/bin/prismlauncher";
+      profile = ./firejail-profiles/prismlauncher.profile;
+    };
+    steam = {
+      executable = "${pkgs.steam}/bin/steam";
+      profile = "${pkgs.firejail}/etc/firejail/steam.profile";
+    };
+    steam-run = {
+      executable = "${pkgs.steam}/bin/steam-run";
+      profile = "${pkgs.firejail}/etc/firejail/steam.profile";
+    };
+  };
+}

user/app/games/games.nix

@@ -14,13 +14,10 @@ in
 {
   home.packages = with pkgs; [
     # Games
-    steam # also requires system-level steam.nix to run
     gamehub
     myRetroarch
     airshipper
     qjoypad
-    prismlauncher
-    #TODO need flatpak steam - I don't have this declaratively yet
   ];
   # The following 2 declarations allow retroarch to be imported into gamehub
   # Set retroarch core directory to ~/.local/bin/libretro