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yarn: drop GE-Proton compat-tool pin from steam-config-nix

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nixpkgs' proton-ge-bin (the package wired into programs.steam.extra-
CompatPackages via modules/desktop-steam.nix) registers in Steam's
compat-tool list under its versioned id, currently GE-Proton10-34.
steam-config-nix's README example uses the unversioned string
"GE-Proton", which on a fresh boot wrote that literal value into
localconfig.vdf — Steam resolved it to no installed tool and silently
fell back to bundled Proton 10. FH5 then launched on stock Proton,
which doesn't pick up PROTON_FSR4_UPGRADE the way GE does.

Drop both `compatTool` (per-app) and `defaultCompatTool` (global).
The wrapper-based launchOptions.env path is unaffected — env vars
still pass through to whatever Proton Steam ends up using. Tool
selection goes back to manual Steam UI > Properties > Compatibility.

A versioned pin (`compatTool = "GE-Proton10-34";`) would work but
couples the host config to whatever the proton-ge-bin nixpkgs entry
ships this week; not worth the maintenance.
This commit is contained in:
Simon Gardling
2026-05-03 00:42:07 -04:00
parent e010b4e3c1
commit 774d748bfe
1 changed files with 10 additions and 6 deletions
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16
hosts/yarn/default.nix
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@@ -159,17 +159,21 @@
};
};
# Steam launch options + per-app compat-tool pin via steam-config-nix
# (different-name/steam-config-nix). The patcher runs as a system oneshot
# at activation; closeSteam = true ensures Steam is shut down before the
# localconfig.vdf write so Steam can't clobber it on its next exit.
# Steam launch options via steam-config-nix (different-name/steam-config-
# nix). The patcher runs as a system oneshot at activation; closeSteam =
# true ensures Steam is shut down before the localconfig.vdf write so Steam
# can't clobber it on its next exit.
#
# No declarative compat-tool pin: nixpkgs' proton-ge-bin registers under
# its versioned tool id (e.g. GE-Proton10-34), not the generic "GE-Proton"
# string steam-config-nix's README assumes, so writing the latter resolved
# to no installed tool and silently fell back to bundled Proton. Pick the
# tool in Steam UI > Properties > Compatibility instead.
programs.steam.config = {
enable = true;
closeSteam = true;
defaultCompatTool = "GE-Proton";
apps."fh5" = {
id = 1551360;
compatTool = "GE-Proton";
launchOptions.env = {
# OptiScaler FSR 4 INT8 path on this RDNA 3 (Navi 32) box.
# PROTON_FSR4_UPGRADE opts FH5 into Proton's FSR 4 DLL upgrade;