diff --git a/Assets/Editor/AetheriaBuild.cs b/Assets/Editor/AetheriaBuild.cs
index 7d3c891d2..3cf434ee4 100644
--- a/Assets/Editor/AetheriaBuild.cs
+++ b/Assets/Editor/AetheriaBuild.cs
@@ -8,12 +8,12 @@ using UnityEditor.AddressableAssets.Settings;
 using UnityEditor.Build.Reporting;
 using Debug = UnityEngine.Debug;
 
-// The one way to make a Win64 player directory. Owns what the directory contains: Aetheria.exe and its data,
+// The one way to make a player directory, for Windows or Linux. Owns what the directory contains: the player and its data,
 // GameData/Aetheria.cc, GameData/Narrative/**, GameData/Mods/** and ModTools/AetherDb. Manual builds, smokes and
 // release cuts all call this and stage nothing themselves.
 //
 //   Unity -batchmode -quit -projectPath <repo> -executeMethod AetheriaBuild.Build
-//         -aetheriaVersion <semver> -aetheriaOut <dir> -logFile <log>
+//         -aetheriaVersion <semver> -aetheriaOut <dir> [-aetheriaTarget win64|linux64] -logFile <log>
 //
 // AetherDb is published from tools/AetherDb, so the headless build's CULTLIB_ROOT / CULTMATH_ROOT (Directory.Build.props)
 // must be set for dotnet when the defaults do not hold the pinned revisions.
@@ -22,6 +22,14 @@ public static class AetheriaBuild
 {
     private static readonly Regex SemVer = new Regex(@"^\d+\.\d+\.\d+([-+][0-9A-Za-z.-]+)?$");
 
+    // A target: the player Unity builds, its executable, and the runtime AetherDb is published for.
+    private static (BuildTarget target, string player, string runtime, string aetherDb) Target(string name) => name switch
+    {
+        "win64" => (BuildTarget.StandaloneWindows64, "Aetheria.exe", "win-x64", "AetherDb.exe"),
+        "linux64" => (BuildTarget.StandaloneLinux64, "Aetheria.x86_64", "linux-x64", "AetherDb"),
+        _ => throw new InvalidOperationException($"-aetheriaTarget {name}: expected win64 or linux64"),
+    };
+
     public static void Build()
     {
         var step = "arguments";
@@ -30,6 +38,7 @@ public static class AetheriaBuild
             var version = Argument("-aetheriaVersion");
             if (!SemVer.IsMatch(version)) throw new InvalidOperationException("-aetheriaVersion is not a semver");
             var output = Path.GetFullPath(Argument("-aetheriaOut"));
+            var target = Target(Argument("-aetheriaTarget", "win64"));
             var repoRoot = Directory.GetParent(UnityEngine.Application.dataPath).FullName;
 
             step = "version";
@@ -46,8 +55,8 @@ public static class AetheriaBuild
             var report = BuildPipeline.BuildPlayer(new BuildPlayerOptions
             {
                 scenes = scenes,
-                locationPathName = Path.Combine(output, "Aetheria.exe"),
-                target = BuildTarget.StandaloneWindows64,
+                locationPathName = Path.Combine(output, target.player),
+                target = target.target,
                 options = BuildOptions.None,
             });
             if (report.summary.result != BuildResult.Succeeded || report.summary.totalErrors != 0)
@@ -57,7 +66,7 @@ public static class AetheriaBuild
             PlayerStaging.Stage(repoRoot, output);
 
             step = "aetherdb";
-            Publish(repoRoot, Path.Combine(output, "ModTools"));
+            Publish(repoRoot, Path.Combine(output, "ModTools"), target.runtime, target.aetherDb);
 
             step = "burst";
             var burst = Path.Combine(output, "Aetheria_BurstDebugInformation_DoNotShip");
@@ -74,11 +83,11 @@ public static class AetheriaBuild
         EditorApplication.Exit(0);
     }
 
-    private static void Publish(string repoRoot, string modTools)
+    private static void Publish(string repoRoot, string modTools, string runtime, string aetherDb)
     {
         var info = new ProcessStartInfo("dotnet")
         {
-            Arguments = $"publish tools/AetherDb -c Release -r win-x64 --self-contained -p:PublishSingleFile=true -o \"{modTools}\"",
+            Arguments = $"publish tools/AetherDb -c Release -r {runtime} --self-contained -p:PublishSingleFile=true -o \"{modTools}\"",
             WorkingDirectory = repoRoot,
             UseShellExecute = false,
             RedirectStandardOutput = true,
@@ -92,15 +101,16 @@ public static class AetheriaBuild
             if (process.ExitCode != 0)
                 throw new InvalidOperationException($"dotnet publish exited {process.ExitCode}:\n{text}\n{errors.Result}");
         }
-        if (!File.Exists(Path.Combine(modTools, "AetherDb.exe")))
-            throw new InvalidOperationException("dotnet publish produced no ModTools/AetherDb.exe");
+        if (!File.Exists(Path.Combine(modTools, aetherDb)))
+            throw new InvalidOperationException($"dotnet publish produced no ModTools/{aetherDb}");
     }
 
-    private static string Argument(string name)
+    private static string Argument(string name, string fallback = null)
     {
         var args = Environment.GetCommandLineArgs();
         var at = Array.IndexOf(args, name);
-        if (at < 0 || at + 1 >= args.Length) throw new InvalidOperationException(name + " is required");
+        if (at < 0 || at + 1 >= args.Length)
+            return fallback ?? throw new InvalidOperationException(name + " is required");
         return args[at + 1];
     }
 }