tModLoader: GoG doesn't work on Mac/Linux (awaiting hashes)

After manually installing (it appears that the installer JAR isn’t yet updated for GOG-based installation) v0.11 Beta 6 with Terraria 1.3.5.3 (GOG 2.17.0.20) on Arch Linux x86_64, starting the game (via start.sh) fails with

Running Terraria [17:01:31] [1/INFO] [tML]: Starting tModLoader v0.11 Beta 6l client [17:01:31] [1/INFO] [tML]: Running on Mono 4.6.1 [17:01:31] [1/INFO] [tML]: Executable: /home/mindbound/Games/Terraria/game/tModLoader.exe [17:01:31] [1/INFO] [tML]: Working Directory: /home/mindbound/Games/Terraria/game [17:01:31] [1/INFO] [tML]: Launch Parameters: [17:01:31] [1/DEBUG] [tML]: Assembly Resolve: Terraria, Version=1.3.5.1, Culture=neutral, PublicKeyToken=null -> MonoMod.RuntimeDetour, Version=19.5.19.1, Culture=neutral, PublicKeyToken=null [17:01:31] [1/DEBUG] [tML]: Assembly Resolve: Terraria, Version=1.3.5.1, Culture=neutral, PublicKeyToken=null -> MonoMod.Utils, Version=19.5.19.1, Culture=neutral, PublicKeyToken=null [17:01:31] [1/WARN] [tML]: First-chance exception reporting is not implemented on Mono [17:01:32] [1/DEBUG] [tML]: Assembly Resolve: Terraria, Version=1.3.5.1, Culture=neutral, PublicKeyToken=null -> Steamworks.NET, Version=9.1.0.0, Culture=neutral, PublicKeyToken=null [17:01:32] [1/DEBUG] [tML]: Assembly Resolve: System.Windows.Forms, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089 -> Accessibility, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a [17:01:32] [1/DEBUG] [tML]: Assembly Resolve: System.Windows.Forms, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089 -> Accessibility, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a [17:01:32] [1/FATAL] [Terraria]: Main engine crash System.DllNotFoundException: CSteamworks at (wrapper managed-to-native) Steamworks.NativeMethods:SteamAPI_RestartAppIfNecessary (AppId_t) at Steamworks.SteamAPI.RestartAppIfNecessary (AppId_t unOwnAppID) [0x00005] in data-0x373bbb0 at Terraria.Social.Steam.CoreSocialModule.Initialize () [0x00010] in tModLoader.exe at Terraria.Social.SocialAPI.Initialize (Nullable[T] mode) [0x00057] in tModLoader.exe at Terraria.Program.LaunchGame_ () [0x0005f] in tModLoader.exe

If I understand it correctly, then v0.11 Beta 6 should be able to run using GOG installation of the game. Please advise.