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ashisgreat22 2026-01-14 21:24:19 +01:00
commit 2be8de47fa
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# Steam Sandboxed with nix-bwrapper
# Provides a sandboxed Steam with restricted permissions like Lutris
{
config,
lib,
pkgs,
inputs,
...
}:
let
bwrapperPkgs = pkgs.extend inputs.nix-bwrapper.overlays.default;
in
{
nixpkgs.overlays = [
(final: prev: {
steam-sandboxed = bwrapperPkgs.mkBwrapper {
app = {
package = prev.steam;
isFhsenv = true; # Steam uses buildFHSEnv
id = "com.valvesoftware.Steam";
env = {
# Unset LD_PRELOAD to avoid mimalloc crashes
LD_PRELOAD = "";
# Propagate XDG_DATA_DIRS for theming
XDG_DATA_DIRS = "$XDG_DATA_DIRS";
# Proton/Wine optimizations
PROTON_USE_NTSYNC = 1;
XDG_CURRENT_DESKTOP = "niri";
XDG_SESSION_TYPE = "wayland";
DBUS_SESSION_BUS_ADDRESS = "unix:path=$XDG_RUNTIME_DIR/bus";
};
};
# Enable X11 and Wayland
sockets.x11 = true;
sockets.wayland = true;
# Disable Flatpak emulation
flatpak.enable = false;
fhsenv = {
skipExtraInstallCmds = true; # Steam package is special, don't try to modify it
};
fhsenv.opts = {
unshareUser = true;
unshareUts = false;
unshareCgroup = false;
unsharePid = false; # Share PIDs for compatibility
unshareNet = false; # Need network for Steam login/downloads
unshareIpc = false;
};
fhsenv.bwrap.baseArgs = lib.mkForce [
"--new-session"
"--proc /proc"
"--dev /dev"
"--dev-bind /dev/dri /dev/dri" # GPU acceleration
"--dev-bind /dev/shm /dev/shm" # Shared memory (required for games)
"--dev-bind-try /dev/uinput /dev/uinput" # Controller support
"--dev-bind-try /dev/input /dev/input" # Controller/input devices
"--dev-bind-try /dev/hidraw0 /dev/hidraw0" # HID devices (controllers)
"--dev-bind-try /dev/hidraw1 /dev/hidraw1"
"--dev-bind-try /dev/hidraw2 /dev/hidraw2"
"--dev-bind-try /dev/hidraw3 /dev/hidraw3"
"--tmpfs /home"
"--tmpfs /tmp"
"--tmpfs /run"
"--dir /run/user"
"--dir /run/user/${toString config.users.users.ashie.uid}"
# System paths
"--ro-bind /sys /sys"
"--ro-bind-try /run/current-system /run/current-system"
"--ro-bind-try /run/opengl-driver /run/opengl-driver"
"--ro-bind-try /run/opengl-driver-32 /run/opengl-driver-32"
"--dir /run/systemd/resolve"
"--ro-bind-try /run/systemd/resolve /run/systemd/resolve"
"--unsetenv LD_PRELOAD"
# udev for controller hotplug
"--ro-bind-try /run/udev /run/udev"
];
mounts = {
read = [
"$HOME/.config/fontconfig"
"$HOME/.local/share/fonts"
"$HOME/.icons"
"$HOME/.themes"
"$HOME/.local/share/themes"
"$HOME/.config/qt6ct"
"$HOME/.config/Kvantum"
"$HOME/.config/MangoHud"
"$HOME/.config/kdedefaults"
"$HOME/.local/share/color-schemes"
];
readWrite = [
"$HOME/Games"
"$HOME/.steam"
"$HOME/.local/share/Steam"
"$HOME/.local/share/umu"
"$HOME/.local/share/applications"
"$HOME/.local/share/desktop-directories"
"$HOME/.local/share/icons"
"$HOME/.local/share/Larian Studios"
"$HOME/Desktop"
];
};
# Disable built-in DBus module (invokes bwrap without --unshare-user)
dbus.enable = false;
# Manually set up DBus proxy with --unshare-user (session bus only)
script.preCmds.stage2 = (import ./sandbox-utils.nix { inherit pkgs lib; }).mkDbusProxyScript {
appId = "com.valvesoftware.Steam";
enableSystemBus = false; # No system bus access
proxyArgs = [
"--filter"
''--talk="org.freedesktop.portal.*"''
''--call="org.freedesktop.portal.*=*@/org/freedesktop/portal/desktop"''
''--talk="org.freedesktop.Notifications"''
''--talk="org.freedesktop.ScreenSaver"''
''--talk="org.kde.StatusNotifierWatcher"''
''--talk="org.kde.KWin"''
''--talk="org.gnome.Mutter.DisplayConfig"''
''--talk="org.freedesktop.secrets"''
''--talk="com.feralinteractive.GameMode"''
''--talk="org.freedesktop.portal.*"''
''--own="com.valvesoftware.Steam"''
''--own="com.valvesoftware.Steam.*"''
];
};
fhsenv.bwrap.additionalArgs = [
# D-Bus session proxy only
''--bind "$XDG_RUNTIME_DIR/app/com.valvesoftware.Steam/bus" "$XDG_RUNTIME_DIR/bus"''
# Wayland socket
''--bind "$XDG_RUNTIME_DIR/$WAYLAND_DISPLAY" "$XDG_RUNTIME_DIR/$WAYLAND_DISPLAY"''
# PipeWire + Pulse
''--bind "$XDG_RUNTIME_DIR/pipewire-0" "$XDG_RUNTIME_DIR/pipewire-0"''
''--bind "$XDG_RUNTIME_DIR/pulse" "$XDG_RUNTIME_DIR/pulse"''
];
};
})
];
}