Repository navigation
Build errors on MacOS 26.6 (Tahoe) #2518
Description
Which version line?
v2 — current (@modelcontextprotocol/inspector@latest)
Which client?
All / shared core
Inspector version
2.8.0
Node version
24.14.1
Operating system (and browser, for the web client)
macOS 26.6
Transport
stdio
MCP server under inspection
I did not get to this point, the target server is https://github.com/jztan/pdf-mcp
Steps to reproduce
- (optional) download fresh repo and cd to the repo ('git clone https://github.com/modelcontextprotocol/inspector.git')
- Run 'cd inspector && npm install'
Expected behavior
Unknown, no error free build yet.
Actual behavior
~/usr/src/gitClones/llm-mcpItems > cd inspector && npm install
@modelcontextprotocol/inspector@2.8.0 postinstall
node scripts/install-clients.mjs
[install-clients] Installing dependencies for clients/web...
npm error code EALLOWSCRIPTS
npm error --allow-scripts is not allowed in project-scoped installs. Add the entries to the "allowScripts" field in package.json, or to .npmrc, instead.
npm error A complete log of this run can be found in: /Users/jlh/.npm/_logs/2026-09-28T01_26_10_941Z-debug-0.log
[install-clients] npm install failed in clients/web (exit 1).
npm error code 1
npm error path /Users/jlh/_usr/src/gitClones/llm-mcpItems/inspector
npm error command failed
npm error command sh -c node scripts/install-clients.mjs
npm error A complete log of this run can be found in: /Users/jlh/.npm/_logs/2026-09-28T01_26_10_245Z-debug-0.log
~/_usr/src/gitClones/llm-mcpItems/inspector > less /Users/jlh/.npm/_logs/2026-09-28T01_26_10_245Z-debug-0.log
~/usr/src/gitClones/llm-mcpItems/inspector > node --version
v24.14.1
~/usr/src/gitClones/llm-mcpItems/inspector >
Logs, errors, or screenshots
2026-09-28T01_26_10_245Z-debug-0.log
Already prototyped a fix?
no yet...
Before you submit
- I searched existing issues and this is not a duplicate.
- This is not a security vulnerability report (those go through the private advisory process).
Activity
cliffhall commentedon Oct 12, 2026
Triage: Priority Medium (total 6)
npm installfrom a clone fails in theinstall-clientscascade withEALLOWSCRIPTS(npm config passed through to the per-client installs);npxusers are unaffectedbuglabelBoard: #28, Status
Incoming(awaiting maintainer review — no milestone yet).test(install): pin the symlinked-checkout guard and spawn node withou…
test(install): pin the env wiring with a stub npm, independent of the…
fix(install): canonicalize both sides of the main guard (#2518)
cliffhall commentedon Oct 13, 2026
Fixed by #2713 (merged to
v2/main); it ships in the next v2 release.Cause:
allow-scriptsset in an npmrc (e.g.~/.npmrc). npm exports every non-default config value to lifecycle scripts asnpm_config_*. So ourinstall-clientspostinstall handed it to the per-clientnpm install, and npm 11.19+ rejects it there, because it arrives through the environment rather than an npmrc. Nothing about macOS was involved.Workaround until the release: comment out the
allow-scriptsline in your npmrc while runningnpm install, or pullv2/main.fix(install): strip npm_config_allow_scripts from the per-client inst…