Not sure how to start a Theia project


I’ve been using Theia for a while, in Docker, as a remote development environment and am now considering it as a framework for a web IDE project at work.

I cloned the repo and successfully started the browser example.

I’m now trying to build the most basic example from the docs after thoroughly following the Requirements instructions. Unfortunately, this is what results from a yarn theia build:

(Sorry, I had to paste it somewhere else; Discourse limits me to 30k characters per post)

This is what my package.json looks like:

  "private": true,
  "dependencies": {
    "@theia/callhierarchy": "next",
    "@theia/file-search": "next",
    "@theia/git": "next",
    "@theia/markers": "next",
    "@theia/messages": "next",
    "@theia/mini-browser": "next",
    "@theia/navigator": "next",
    "@theia/outline-view": "next",
    "@theia/plugin-ext-vscode": "next",
    "@theia/preferences": "next",
    "@theia/preview": "next",
    "@theia/search-in-workspace": "next",
    "@theia/terminal": "next"
  "devDependencies": {
    "@theia/cli": "next"

Any clue?


@vincent the issue has been reported upstream:, for the moment you can use a yarn resolution or copy the yarn.lock file present in the upstream repo to resolve the issue temporarily until a fix is provided.

Sorry, I thought I did enough research before posting…

Thank you very much.

1 Like