From 12314857d8b9fdc17c5dd97b1b92a36d8463c386 Mon Sep 17 00:00:00 2001
From: Erich Blume <725328+eblume@users.noreply.github.com>
Date: Fri, 15 May 2026 06:27:43 -0700
Subject: [PATCH] C0: add GE-Proton to ringtail Steam extraCompatPackages

Lets Subnautica 2 (and any other game) opt into the GE-Proton
build via Steam's per-game compatibility tool override, as a
workaround for the Proton Experimental + DXVK D3D12 Mercuna hang.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
---
 docs/changelog.d/+ringtail-proton-ge.infra.md | 4 ++++
 nixos/ringtail/gaming.nix                     | 1 +
 2 files changed, 5 insertions(+)
 create mode 100644 docs/changelog.d/+ringtail-proton-ge.infra.md

diff --git a/docs/changelog.d/+ringtail-proton-ge.infra.md b/docs/changelog.d/+ringtail-proton-ge.infra.md
new file mode 100644
index 0000000..0d8bc04
--- /dev/null
+++ b/docs/changelog.d/+ringtail-proton-ge.infra.md
@@ -0,0 +1,4 @@
+Add GE-Proton (`pkgs.proton-ge-bin`) to `programs.steam.extraCompatPackages`
+on ringtail. Subnautica 2 hangs at Mercuna plugin init under Proton
+Experimental + DXVK D3D12; GE-Proton is available as a Steam per-game
+compatibility option to work around it.
diff --git a/nixos/ringtail/gaming.nix b/nixos/ringtail/gaming.nix
index d84ef9b..c526857 100644
--- a/nixos/ringtail/gaming.nix
+++ b/nixos/ringtail/gaming.nix
@@ -5,6 +5,7 @@
   programs.steam = {
     enable = true;
     dedicatedServer.openFirewall = true;
+    extraCompatPackages = [ pkgs.proton-ge-bin ];
   };
 
   # Proton Experimental ships an accessibility bridge (xalia) that hangs during