Amazon Q LSP: Failure to initialize on NixOS - EPIPE error during LSP startup

## Problem
As a NixOS user attempting to use Amazon Q, the Language Server fails to start. NixOS being an immutable operating system, this appears to be a configuration-related issue with the Language Server initialization.

## Steps to reproduce the issue
1. Install Amazon Q extension in VS Code on NixOS
2. Open VS Code
3. Attempt to initialize Amazon Q
4. Language Server fails to start

## Expected behavior
The Language Server should initialize successfully and Amazon Q should be available for use within VS Code.

## System details
- OS: NixOS 25.05 (Warbler)
- Visual Studio Code version (VSCodium): 1.98.2 Release: 25072
- AWS Toolkit version: N/A
- Amazon Q version: 1.54.0

Amazon Q About:
- OS: Linux x64 6.12.19
- Visual Studio Code extension host: 1.98.2
- Amazon Q: 1.54.0
- node: 20.18.2
- electron: 34.2.0

## Relevant logs
```log
[info] using amazonqWorkspaceLsp service configuration: default
[info] lsp: Failed to download latest "AmazonQ-Workspace" manifest. Falling back to local manifest.
[info] lsp: Finished setting up LSP server
[info] [Error] Starting client failed
[info] Error: write EPIPE
at afterWriteDispatched (node:internal/stream_base_commons:161:15)
at writeGeneric (node:internal/stream_base_commons:152:3)
at Socket._writeGeneric (node:net:958:11)
at Socket._write (node:net:970:8)
at writeOrBuffer (node:internal/streams/writable:572:12)
at _write (node:internal/streams/writable:501:10)
at Writable.write (node:internal/streams/writable:510:10)
at /nix/store/-vscode-extension-amazonwebservices-amazon-q-vscode-1.54.0/share/vscode/extensions/amazonwebservices.amazon-q-vscode/dist/src/extensionNode.js:7259:3222
at new Promise ()
at x.send (/nix/store/-vscode-extension-amazonwebservices-amazon-q-vscode-1.54.0/share/vscode/extensions/amazonwebservices.amazon-q-vscode/dist/src/extensionNode.js:7259:3201)
at /nix/store/-vscode-extension-amazonwebservices-amazon-q-vscode-1.54.0/share/vscode/extensions/amazonwebservices.amazon-q-vscode/dist/src/extensionNode.js:7211:207
at x.createMessageTransports (/nix/store/-vscode-extension-amazonwebservices-amazon-q-vscode-1.54.0/share/vscode/extensions/amazonwebservices.amazon-q-vscode/dist/src/extensionNode.js:6456:30748)
at x.createConnection (/nix/store/-vscode-extension-amazonwebservices-amazon-q-vscode-1.54.0/share/vscode/extensions/amazonwebservices.amazon-q-vscode/dist/src/extensionNode.js:6456:8193)
at x.resolveConnection (/nix/store/-vscode-extension-amazonwebservices-amazon-q-vscode-1.54.0/share/vscode/extensions/amazonwebservices.amazon-q-vscode/dist/src/extensionNode.js:6456:3445)
at x.start (/nix/store/-vscode-extension-amazonwebservices-amazon-q-vscode-1.54.0/share/vscode/extensions/amazonwebservices.amazon-q-vscode/dist/src/extensionNode.js:6456:2095)
at w (/nix/store/-vscode-extension-amazonwebservices-amazon-q-vscode-1.54.0/share/vscode/extensions/amazonwebservices.amazon-q-vscode/dist/src/extensionNode.js:6494:15863)
at /nix/store/-vscode-extension-amazonwebservices-amazon-q-vscode-1.54.0/share/vscode/extensions/amazonwebservices.amazon-q-vscode/dist/src/extensionNode.js:6494:23212
at /nix/store/-vscode-extension-amazonwebservices-amazon-q-vscode-1.54.0/share/vscode/extensions/amazonwebservices.amazon-q-vscode/dist/src/extensionNode.js:7211:629
at AsyncLocalStorage.run (node:async_hooks:346:14)
at /nix/store/-vscode-extension-amazonwebservices-amazon-q-vscode-1.54.0/share/vscode/extensions/amazonwebservices.amazon-q-vscode/dist/src/extensionNode.js:7245:10371
at I.withTraceId (/nix/store/-vscode-extension-amazonwebservices-amazon-q-vscode-1.54.0/share/vscode/extensions/amazonwebservices.amazon-q-vscode/dist/src/extensionNode.js:7245:10601)
at I.run (/nix/store/-vscode-extension-amazonwebservices-amazon-q-vscode-1.54.0/share/vscode/extensions/amazonwebservices.amazon-q-vscode/dist/src/extensionNode.js:7245:10267)
at Object.run (/nix/store/-vscode-extension-amazonwebservices-amazon-q-vscode-1.54.0/share/vscode/extensions/amazonwebservices.amazon-q-vscode/dist/src/extensionNode.js:7245:11070)
at s (/nix/store/-vscode-extension-amazonwebservices-amazon-q-vscode-1.54.0/share/vscode/extensions/amazonwebservices.amazon-q-vscode/dist/src/extensionNode.js:7211:562)
at /nix/store/-vscode-extension-amazonwebservices-amazon-q-vscode-1.54.0/share/vscode/extensions/amazonwebservices.amazon-q-vscode/dist/src/extensionNode.js:6494:23179
at async /nix/store/-vscode-extension-amazonwebservices-amazon-q-vscode-1.54.0/share/vscode/extensions/amazonwebservices.amazon-q-vscode/dist/src/extensionNode.js:7211:623
at async s (/nix/store/-vscode-extension-amazonwebservices-amazon-q-vscode-1.54.0/share/vscode/extensions/amazonwebservices.amazon-q-vscode/dist/src/extensionNode.js:7211:523)
at async f.setupLsp (/nix/store/-vscode-extension-amazonwebservices-amazon-q-vscode-1.54.0/share/vscode/extensions/amazonwebservices.amazon-q-vscode/dist/src/extensionNode.js:6494:23060)
at async Immediate. (/nix/store/-vscode-extension-amazonwebservices-amazon-q-vscode-1.54.0/share/vscode/extensions/amazonwebservices.amazon-q-vscode/dist/src/extensionNode.js:6494:22010)

Reproduce the failure using the listed NixOS, VSCodium, and Amazon Q versions, then inspect dist/src/extensionNode.js around setupLsp, createMessageTransports, and the reported write EPIPE call. Done means the Language Server initializes successfully in VS Code on NixOS; the issue names no source test, so validation must be established while investigating.

Written by the indexing model from the issue text.