Could not load assembly Steamworks

Describe the bug

I have a CI server that build my game using this Docker image (running on Linux environment).

Here is the error I get:

Start importing Assets/Plugins/Facepunch.Steamworks/redistributable_bin/linux64/libsteam_api.so using Guid(a3b75fd2a03fb3149b60c2040555c3fe) Importer(-1,00000000000000000000000000000000)  -> (target hash: '3a1ede127da4047ae756f122896527e5') in 0.558551 seconds
Start importing Assets/Plugins/Facepunch.Steamworks/Facepunch.Steamworks.Win64.dll using Guid(b3ad7ccc15f481747842885a21b7b4ab) Importer(-1,00000000000000000000000000000000)  -> (target hash: '6020022bb5ae380b501cbc721695cfc8') in 0.180582 seconds
Start importing Assets/Plugins/Facepunch.Steamworks/redistributable_bin/steam_api.dll using Guid(f47308500f9b7734392a75ff281c7457) Importer(-1,00000000000000000000000000000000)  -> (target hash: '719a622d266dbbec9cbfcaad3bad4d71') in 0.004972 seconds
Start importing Assets/Plugins/Facepunch.Steamworks/Facepunch.Steamworks.Win32.dll using Guid(fb41692bc4208c0449c96c0576331408) Importer(-1,00000000000000000000000000000000)  -> (target hash: 'fe5b7939d222023beac8cd8060e94dbb') in 0.050592 seconds
Start importing Assets/Plugins/Facepunch.Steamworks/Facepunch.Steamworks.Posix.dll using Guid(fc89a528dd38bd04a90af929e9c0f80e) Importer(-1,00000000000000000000000000000000)  -> (target hash: '2a7bfaf641c3b093beb1fbf65a32e7b3') in 0.040369 seconds
Start importing Assets/Plugins/Facepunch.Steamworks/redistributable_bin/osx/libsteam_api.bundle using Guid(7d6647fb9d80f5b4f9b2ff1378756bee) Importer(-1,00000000000000000000000000000000)  -> (target hash: 'c1bba71b19b5f87752cfef8071e94739') in 0.004326 seconds
Start importing Assets/Plugins/Facepunch.Steamworks/redistributable_bin/linux32/libsteam_api.so using Guid(fd99b19e202e95a44ace17e10bac2feb) Importer(-1,00000000000000000000000000000000)  -> (target hash: '8593427794e4856ded643d9bc44805d1') in 0.004315 seconds
Start importing Assets/Plugins/Facepunch.Steamworks/redistributable_bin/win64/steam_api64.dll using Guid(cf5718c4ee1c31e458f8a58a77f4eef0) Importer(-1,00000000000000000000000000000000)  -> (target hash: '2489f72496502944a3b6a508fcacae29') in 0.004956 seconds
Begin MonoManager ReloadAssembly
Symbol file LoadedFromMemory doesn't match image /builds/Team/Project/Library/PackageCache/com.unity.ext.nunit@1.0.0/net35/unity-custom/nunit.framework.dll
Native extension for LinuxStandalone target not found
Native extension for WindowsStandalone target not found
Refreshing native plugins compatible for Editor in 160.22 ms, found 1 plugins.
Preloading 0 native plugins for Editor in 0.00 ms.
Could not load assembly Steamworks, Version=0.0.0.0, Culture=neutral, PublicKeyToken=null

However I have no problem to make local build on Windows.

For the installation, I only did the steps described here.

I’m using Unity 2020.1.0f1

[Noxalus]

OK, I confirm the solution given in my previous message works.

Before to made the change, I couldn’t compile neither for Linux nor Windows. But if I make the change, it’s ok for both target platforms.

Doing the same change on my project, the issue is fixed too when the CI builds the project in the Docker container too.

Here are the changes detected by Git:

I suppose that the issue will be the same if the host environment to build is a Mac OS, but for now the solution is good enough for me. 👍

[linjmeyer]

Thankyou @Noxalus! I had the same issue. Everything worked locally, but in CI I was getting namespace not found 'steamworks'. After changing the editor .dll platform to Linux from OSX all three of my CI builds (OSX, Windows, Linux) began working.