Setup the Linux Cross-Compile Toolchain
In this guide, we will show how to set up the Linux Cross-Compile Toolchain on Windows OS to enable Linux packaging in Unreal Engine.
After completing this setup, Unreal Engine will be able to package your project as a Linux build from a Windows machine.
Follow the steps below:
Step 1. Open Unreal Engine Library in Epic Games Launcher
Open the Epic Games Launcher.
Go to: Unreal Engine → Library
Here, you will see the installed Unreal Engine versions.
Figure 1. Unreal Engine Library in Epic Games Launcher
Step 2. Open the Engine Version Menu
Find the Unreal Engine version you want to use for Linux packaging.
Click the three-dot / more icon beside that engine version.
Figure 2. Opening the Unreal Engine Version Menu
Step 3. Select Options
From the menu, click Options.
This will open the installation options for the selected Unreal Engine version.
Figure 3. Selecting Options for the Unreal Engine Version
Step 4. Enable Linux Target Platform
In the options window, go to the Target Platforms section.
Enable Linux, then click Apply.
Epic Games Launcher will begin downloading the required Linux platform files.
Figure 4. Enabling Linux Target Platform Support
After clicking Apply, the download will start.
Figure 5. Linux Platform Support Download in Progress
Wait until the installation is complete before continuing to the next step.
Step 5. Download the Linux Cross-Compile Toolchain
Go to the Epic Official Doc for Linux development requirements. Find the Cross-Compile Toolchain section and download the toolchain that matches your Unreal Engine version.
Make sure you select the correct toolchain version for your installed Unreal Engine version.
Figure 6. Downloading the Linux Cross-Compile Toolchain from Epic Documentation
Step 6. Run the Downloaded Toolchain Installer
After the download is complete, locate the downloaded toolchain installer.
Double-click the installer to start the installation process.
Figure 7. Launching the Linux Cross-Compile Toolchain Installer
Step 7. Complete the Toolchain Installation
Follow the installer instructions.
Click Yes, Next, and OK where required to complete the installation.
Keep the default installation path unless you have a specific location you want to use.
Figure 8. Confirming Toolchain Installer Permission
Figure 9. Completing the Toolchain Installation
Step 8. Open Environment Variables
Open the Windows search menu and search for:
Edit the system environment variables
Then open it and click Environment Variables.
Figure 10. Opening Windows Environment Variables
Step 9. Edit LINUX_MULTIARCH_ROOT
Under the environment variables list, find:
LINUX_MULTIARCH_ROOT
Select it and click Edit.
This variable tells Unreal Engine where the Linux Cross-Compile Toolchain is installed.
Figure 11. Editing the LINUX_MULTIARCH_ROOT Environment Variable
Step 10. Select the Toolchain Installation Path
Browse to the toolchain installation directory.
Example path:
C:\UnrealToolchains\v26_clang-20.1.8-rockylinux8
Select the folder and click OK.
Make sure the selected path points to the correct installed toolchain folder.
Figure 12. Selecting the Linux Cross-Compile Toolchain Directory
Step 11. Save the Environment Variable Changes
Click OK on all open windows to save the environment variable changes.
This will apply the updated LINUX_MULTIARCH_ROOT path.
Figure 13. Saving the Environment Variable Configuration
Step 12. Restart the Machine
Restart your computer to make sure the environment variable changes are fully applied.
After restarting, Unreal Engine should be able to detect the Linux Cross-Compile Toolchain.
Figure 14. Restarting the Machine to Apply Changes
Video Guidance
For a complete visual walkthrough, you can watch the video tutorial below.
https://www.youtube.com/watch?v=o-pdJXgJzRcImportant Note
Make sure the Linux Cross-Compile Toolchain version matches your Unreal Engine version.
For example, if you are using Unreal Engine 5.7, download the toolchain supported for Unreal Engine 5.7.
Using the wrong toolchain version may cause packaging errors.
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