IntelliJ Ultimate - Getting "empty" work folder inside connected Devcontainer

IntelliJ - Mount path from WSL2 to connected Devcontainer not working!

I'm trying to mount a project directory from my WSL2 instance into a Devcontainer. The issue is that when I use IntelliJ Ultimate to launch the container, the mounted folder appears empty. This same configuration works perfectly when launched from VSCode.

The mount from //wsl.localhost/Ubuntu-22.04/home/oskar/projects/myproject to /workspaces/myproject results in an empty target directory inside the running container.

I suspect the //wsl.localhost path isn't being resolved correctly by IntelliJ's Devcontainer integration. I'm not sure what the correct path format should be and would appreciate any suggestions.

 

The mount of the work folder is done in devcontainer.json using this setting…
 

"workspaceFolder": "/workspaces/${localWorkspaceFolderBasename}",

My environment facts:

• Windows 11
• IntelliJ IDEA 2025.2 (Ultimate Edition)
• WSL2 (Ubuntu-22.04 LTS) - (project files in my WSL2 is located at: /home/oskar/projects/myproject)
• Docker Desktop 4.44.3 (202357)