VS Code version

1.105.1

Extension version

3.3.0

Biome version

2.3.1

Operating system

• Windows
• macOS
• Linux

Description

I've got fnm version 1.38.1 installed.

The following is the result of Get-Command biome

PS C:\> Get-Command biome

CommandType     Name                                               Version    Source
-----------     ----                                               -------    ------
ExternalScript  biome.ps1                                                     C:\Users\micha\AppData\Local\fnm_multishells\15776_1761628874181\biome.ps1


PS C:\>

I am able to execute Biome without error from PowerShell directly.

If I attempt to use the Biome VSCode extension I get the following in the "OUTPUT" tab

2025-10-28 14:24:20.951 [info]  🔒 Started listening for lockfile changes.
2025-10-28 14:24:20.952 [info]  ⚙️ Started listening for extension settings changes.
2025-10-28 14:24:20.952 [warning] 🔍 Could not find global Node Modules path for npm
2025-10-28 14:24:21.709 [error] Unable to find the Biome binary.

and I am unable to format any files.

If I update "biome.lsp.bin" to point to the node_modules folder of a project with Biome installed, I can work around this. But I am unable to use the globally installed instance of Biome.

If I specify ,"biome.lsp.bin": "C:\\Users\\micha\\AppData\\Local\\fnm_multishells\\15776_1761628874181\\biome.ps1" then I get the following output

2025-10-28 14:47:07.427 [info]  🔒 Started listening for lockfile changes.
2025-10-28 14:47:07.427 [info]  ⚙️ Started listening for extension settings changes.
2025-10-28 14:47:07.427 [warning] 🔍 Unshimmed Biome binary from "c:\Users\micha\AppData\Local\fnm_multishells\15776_1761628874181\biome.ps1" to "C:\Users\micha\AppData\Roaming\fnm\node-versions\v24.4.0\installation\node_modules\@biomejs\biome\node_modules\@biomejs\cli-win32-x64\biome.exe"
2025-10-28 14:47:07.846 [info]  ✅ Biome is ready.

However, then I get a popup saying, "biome client: couldn't create connection to server." and formatting does not work.

Steps to reproduce

1. Install fnm on Windows
2. Use npm i -g @biomejs/biome to install Biome globally
3. Install the Biome VSCode extension
4. Attempt to format a file.

Expected behavior

I expect that the Biome binary would be found.

Does this issue occur when using the CLI directly?

No

Link to a minimal reproduction

No response

Logs

2025-10-28 14:24:20.951 [info]  🔒 Started listening for lockfile changes.
2025-10-28 14:24:20.952 [info]  ⚙️ Started listening for extension settings changes.
2025-10-28 14:24:20.952 [warning] 🔍 Could not find global Node Modules path for npm
2025-10-28 14:24:21.709 [error] Unable to find the Biome binary.