Options
Jovian-NixOS adds a set of extra options that can be used in your NixOS configurations under the jovian prefix.
Note The options listing is available on the website.
jovian.decky-loader.enable
Name:
jovian.decky-loader.enable
Default:
false
Type:
Description:
Whether to enable the Steam Deck Plugin Loader.
Declared by:
jovian.decky-loader.extraPackages
Name:
jovian.decky-loader.extraPackages
Default:
[ ]
Type:
Description:
Extra packages to add to the service PATH.
Declared by:
jovian.decky-loader.extraPythonPackages
Name:
jovian.decky-loader.extraPythonPackages
Default:
pythonPackages: []
Type:
Description:
Extra Python packages to add to the PYTHONPATH of the loader.
Declared by:
jovian.decky-loader.package
Name:
jovian.decky-loader.package
Default:
pkgs.decky-loader
Type:
Description:
The loader package to use.
Declared by:
jovian.decky-loader.stateDir
Name:
jovian.decky-loader.stateDir
Default:
"/var/lib/decky-loader"
Type:
Description:
Directory to store plugins and data.
Declared by:
jovian.decky-loader.user
Name:
jovian.decky-loader.user
Default:
"decky"
Type:
Description:
The user Decky Loader should run plugins as.
Declared by:
jovian.devices.steamdeck.autoUpdate
Name:
jovian.devices.steamdeck.autoUpdate
Default:
false
Type:
Description:
Whether to automatically update the BIOS and controller firmware.
Declared by:
jovian.devices.steamdeck.enable
Name:
jovian.devices.steamdeck.enable
Default:
false
Type:
Description:
Whether to enable Steam Deck-specific configurations.
Declared by:
jovian.devices.steamdeck.enableControllerUdevRules
Name:
jovian.devices.steamdeck.enableControllerUdevRules
Default:
config.jovian.devices.steamdeck.enable
Type:
Description:
Enables udev rules to make the controller controllable by users.
Without this, neither steam, nor any other userspace client can switch the controller from out of its default "lizard" mode.
Declared by:
jovian.devices.steamdeck.enableDefaultCmdlineConfig
Name:
jovian.devices.steamdeck.enableDefaultCmdlineConfig
Default:
config.jovian.devices.steamdeck.enable
Type:
Description:
Whether to enable Steam Deck command line flags.
Declared by:
jovian.devices.steamdeck.enableDefaultStage1Modules
Name:
jovian.devices.steamdeck.enableDefaultStage1Modules
Default:
config.jovian.devices.steamdeck.enable
Type:
Description:
Whether to enable essential kernel modules in initrd.
Declared by:
jovian.devices.steamdeck.enableFwupdBiosUpdates
Name:
jovian.devices.steamdeck.enableFwupdBiosUpdates
Default:
config.jovian.devices.steamdeck.enable
Type:
Description:
Whether to use fwupd to update the BIOS.
Declared by:
jovian.devices.steamdeck.enableGyroDsuService
Name:
jovian.devices.steamdeck.enableGyroDsuService
Default:
false
Type:
Description:
Whether to enable the Cemuhook DSU service for the gyroscope.
If enabled, motion data from the gyroscope can be used in Cemu with Cemuhook.
Declared by:
jovian.devices.steamdeck.enableKernelPatches
Name:
jovian.devices.steamdeck.enableKernelPatches
Default:
config.jovian.devices.steamdeck.enable
Type:
Description:
Whether to apply kernel patches if available.
Declared by:
jovian.devices.steamdeck.enableOsFanControl
Name:
jovian.devices.steamdeck.enableOsFanControl
Default:
config.jovian.devices.steamdeck.enable
Type:
Description:
Whether to enable the OS-controlled fan curve.
This is enabled by default since SteamOS 3.2.
Declared by:
jovian.devices.steamdeck.enablePerfControlUdevRules
Name:
jovian.devices.steamdeck.enablePerfControlUdevRules
Default:
config.jovian.devices.steamdeck.enable
Type:
Description:
Whether to make performance-related device attributes controllable by users.
The Steam Deck Client directly modifies several device attributes to control the display brightness and to enable performance tuning (TDP limit, GPU clock control).
Declared by:
jovian.devices.steamdeck.enableSoundSupport
Name:
jovian.devices.steamdeck.enableSoundSupport
Default:
config.jovian.devices.steamdeck.enable
Type:
Description:
Whether to enable sound support.
Declared by:
jovian.devices.steamdeck.enableXorgRotation
Name:
jovian.devices.steamdeck.enableXorgRotation
Default:
config.jovian.devices.steamdeck.enable
Type:
Description:
Whether to rotate the display panel in X11.
Declared by:
jovian.hardware.amd.gpu.enableBacklightControl
Name:
jovian.hardware.amd.gpu.enableBacklightControl
Default:
config.jovian.hardware.has.amd.gpu
Type:
Description:
Whether to loosen access to the backlight device nodes.
Declared by:
jovian.hardware.amd.gpu.enableEarlyModesetting
Name:
jovian.hardware.amd.gpu.enableEarlyModesetting
Default:
config.jovian.hardware.has.amd.gpu
Type:
Description:
Whether to enable early kernel modesetting.
Declared by:
jovian.hardware.has.amd.gpu
Name:
jovian.hardware.has.amd.gpu
Default:
false
Type:
Description:
Whether the device has an AMD GPU.
Declared by:
jovian.steam.autoStart
Name:
jovian.steam.autoStart
Default:
false
Type:
Description:
Whether to automatically launch the Steam Deck UI on boot.
Traditional Display Managers cannot be enabled in conjunction with this option.
Declared by:
jovian.steam.desktopSession
Name:
jovian.steam.desktopSession
Default:
null
Type:
Description:
The session to launch for Desktop Mode.
By default, attempting to switch to the desktop will launch Gaming Mode again.
Declared by:
jovian.steam.enable
Name:
jovian.steam.enable
Default:
false
Type:
Description:
Whether to enable the Steam Deck UI.
When enabled, you can either use the autoStart option (preferred),
launch the Steam Deck UI from your Display Manager or
by running start-gamescope-session.
Declared by:
jovian.steam.environment
Name:
jovian.steam.environment
Default:
{ }
Type:
Description:
Additional environment variables or overrides to environment variables that will be applied to the gamescope session.
Declared by:
jovian.steam.updater.splash
Name:
jovian.steam.updater.splash
Default:
"steamos"
Type:
Description:
Configures the source of the splash screen used by the updater (preloader) step when launching Steam.
When steamos, this will use the vendor-selected image, scaled appropriately.
When jovian, this will use the Jovian Experiments logo, scaled appropriately.
When bgrt, the BGRT (UEFI vendor logo) will be used.
When vendor, the vendor default will not be changed. This differs from default in that
on systems other than the Steam Deck, the scaling may not be correct.
The scale of the vendor logo (in
vendor) is incorrect when the display resolution is different from 1280 pixels wide. The updater logo will be bigger than the one used in the startup animation.
Declared by:
jovian.steam.user
Name:
jovian.steam.user
Default:
(unset)Type:
Description:
The user to run Steam with.
Declared by:
jovian.steamos.enableAutoMountUdevRules
Name:
jovian.steamos.enableAutoMountUdevRules
Default:
config.jovian.steamos.useSteamOSConfig
Type:
Description:
Whether to enable udev rules to automatically mount SD cards upon insertion.
Declared by:
jovian.steamos.enableBluetoothConfig
Name:
jovian.steamos.enableBluetoothConfig
Default:
config.jovian.steamos.useSteamOSConfig
Type:
Description:
Adjust default BlueZ settings to match SteamOS.
Declared by:
jovian.steamos.enableDefaultCmdlineConfig
Name:
jovian.steamos.enableDefaultCmdlineConfig
Default:
config.jovian.steamos.useSteamOSConfig
Type:
Description:
Whether to enable SteamOS kernel command line flags.
Declared by:
jovian.steamos.enableEarlyOOM
Name:
jovian.steamos.enableEarlyOOM
Default:
config.jovian.steamos.useSteamOSConfig
Type:
Description:
Enable SteamOS-like earlyoom config.
Declared by:
jovian.steamos.enableMesaPatches
Name:
jovian.steamos.enableMesaPatches
Default:
config.jovian.steamos.useSteamOSConfig
Type:
Description:
Whether to apply the Mesa patches if available.
Currently, they allow the swapchain interval to be changed by the framerate limiter in gamescope.
Declared by:
jovian.steamos.enableProductSerialAccess
Name:
jovian.steamos.enableProductSerialAccess
Default:
config.jovian.steamos.useSteamOSConfig
Type:
Description:
Loosen the product_serial node to
440 / root:wheel, rather than400 / root:rootto allow the physical users to read S/N without auth. — holo-dmi-rules 1.0
Declared by:
jovian.steamos.enableSysctlConfig
Name:
jovian.steamos.enableSysctlConfig
Default:
config.jovian.steamos.useSteamOSConfig
Type:
Description:
Whether to enable SteamOS sysctl configurations
Declared by:
jovian.steamos.enableVendorRadv
Name:
jovian.steamos.enableVendorRadv
Default:
config.jovian.steamos.useSteamOSConfig && config.jovian.hardware.has.amd.gpu
Type:
Description:
Whether to enable the vendor branch of Mesa RADV.
Declared by:
jovian.steamos.enableZram
Name:
jovian.steamos.enableZram
Default:
config.jovian.steamos.useSteamOSConfig
Type:
Description:
Whether to enable SteamOS-like zram swap configuration
Declared by:
jovian.steamos.useSteamOSConfig
Name:
jovian.steamos.useSteamOSConfig
Default:
"config.jovian.steam.enable"
Type:
Description:
Whether to enable opinionated system configuration from SteamOS.
When true, this will enable most options under the jovian.steamos namespace.
Declared by:
jovian.workarounds.ignoreMissingKernelModules
Name:
jovian.workarounds.ignoreMissingKernelModules
Default:
true
Type:
Description:
Whether to ignore missing kernel modules.