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Fixed in 2021.1.X

Fixed in 2020.2.X



Found in




Issue ID




[Linux] WebGL build always fails and throws a FileNotFoundException



How to reproduce:
1. Create and open a new project
2. Press Ctrl+Shift+B to open the "Build Settings" window
3. In the "Platform" section select "WebGL"
4. In the bottom right of the "Build Settings" window press the "Switch Platform" button
5. After the project has switched platform press the "Build" button
6. Wait for the build to finish and observe the Console window

Expected result: The Console outputs that the build has succeeded
Actual result: The Console outputs that the build has failed along with a "FileNotFoundException" type error

Reproducible with: 2020.1.0a7, 2020.1.4f1, 2020.2.0b1
Not reproducible with: 2018.4.26f1, 2019.4.9f1, 2020.1.0a6

1. Reproducible on Ubuntu 18.04
2. Not reproducible on Windows 10

  1. Resolution Note (fix version 2021.1):

    WebGL builds on Linux will now use the version of 7za included with the Editor instead of the system gzip. This prevents the gzip possibly being called with invalid parameters.

    Fixed in 2021.1.0a9

  2. Resolution Note (fix version 2020.2):

    Support for using IL2CPP sysroot packages has been added to the WebGL build process. If a sysroot package is active in the project, it will be used. This allows Unity to provide a self contained and consistent build environment for Linux, independent of what's installed in the OS.

    Fixed in 2020.2.2f1

Comments (2)

  1. Taalon

    May 28, 2022 03:52

    I Upgraded to LTR 2021. Working through unity essentials. Tried to publish simple scene -- no control; just a ball rolling. None of the assets were included. Only specified lighting and skybox shows up. Pretty shitty.

  2. JDFunz

    Nov 13, 2020 16:01

    This really needs to be fixed, its halted development on a project of mine.

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