diff --git a/pkgs/games/r2modman/default.nix b/pkgs/games/r2modman/default.nix
index c7c8d6a10768..4e5096eb96f8 100644
--- a/pkgs/games/r2modman/default.nix
+++ b/pkgs/games/r2modman/default.nix
@@ -28,6 +28,11 @@ stdenv.mkDerivation rec {
     hash = "sha256-CXitb/b2tvTfrkFrFv4KP4WdmMg+1sDtC/s2u5ezDfI=";
   };
 
+  patches = [
+    # Make it possible to launch Steam games from r2modman.
+    ./steam-launch-fix.patch
+  ];
+
   nativeBuildInputs = [
     yarn
     fixup_yarn_lock
diff --git a/pkgs/games/r2modman/steam-launch-fix.patch b/pkgs/games/r2modman/steam-launch-fix.patch
new file mode 100644
index 000000000000..4a52c8fdb359
--- /dev/null
+++ b/pkgs/games/r2modman/steam-launch-fix.patch
@@ -0,0 +1,21 @@
+diff --git a/src/r2mm/launching/runners/linux/SteamGameRunner_Linux.ts b/src/r2mm/launching/runners/linux/SteamGameRunner_Linux.ts
+index ddee0e9..fc9ffca 100644
+--- a/src/r2mm/launching/runners/linux/SteamGameRunner_Linux.ts
++++ b/src/r2mm/launching/runners/linux/SteamGameRunner_Linux.ts
+@@ -61,15 +61,9 @@ export default class SteamGameRunner_Linux extends GameRunnerProvider {
+     async start(game: Game, args: string): Promise<void | R2Error> {
+ 
+         const settings = await ManagerSettings.getSingleton(game);
+-        const steamDir = await GameDirectoryResolverProvider.instance.getSteamDirectory();
+-        if(steamDir instanceof R2Error) {
+-            return steamDir;
+-        }
+-
+-        LoggerProvider.instance.Log(LogSeverity.INFO, `Steam directory is: ${steamDir}`);
+ 
+         try {
+-            const cmd = `"${steamDir}/steam.sh" -applaunch ${game.activePlatform.storeIdentifier} ${args} ${settings.getContext().gameSpecific.launchParameters}`;
++            const cmd = `steam -applaunch ${game.activePlatform.storeIdentifier} ${args} ${settings.getContext().gameSpecific.launchParameters}`;
+             LoggerProvider.instance.Log(LogSeverity.INFO, `Running command: ${cmd}`);
+             await exec(cmd);
+         } catch(err) {
diff --git a/pkgs/top-level/all-packages.nix b/pkgs/top-level/all-packages.nix
index 10f61b2cd66c..e97e9ca1cf5b 100644
--- a/pkgs/top-level/all-packages.nix
+++ b/pkgs/top-level/all-packages.nix
@@ -38442,7 +38442,10 @@ with pkgs;
 
   r2mod_cli = callPackage ../games/r2mod_cli { };
 
-  r2modman = callPackage ../games/r2modman { };
+  r2modman = callPackage ../games/r2modman {
+    # Electron 26 has regressions making applications unusable.
+    electron = electron_25;
+  };
 
   racer = callPackage ../games/racer { };