npm install fails

[chrishodgson]

2532 verbose stack Error: grpc@1.10.1 install: `node-pre-gyp install --fallback-to-build --library=static_library`
2532 verbose stack Exit status 1
2532 verbose stack     at EventEmitter.<anonymous> (/usr/local/lib/node_modules/npm/node_modules/npm-lifecycle/index.js:304:16)
2532 verbose stack     at EventEmitter.emit (events.js:182:13)
2532 verbose stack     at ChildProcess.<anonymous> (/usr/local/lib/node_modules/npm/node_modules/npm-lifecycle/lib/spawn.js:55:14)
2532 verbose stack     at ChildProcess.emit (events.js:182:13)
2532 verbose stack     at maybeClose (internal/child_process.js:961:16)
2532 verbose stack     at Process.ChildProcess._handle.onexit (internal/child_process.js:248:5)
2533 verbose pkgid grpc@1.10.1
2534 verbose cwd /Users/user/Sites/trial-apps/rauchg-blog
2535 verbose Darwin 17.7.0
2536 verbose argv "/usr/local/Cellar/node/10.7.0/bin/node" "/usr/local/bin/npm" "install"
2537 verbose node v10.7.0
2538 verbose npm  v6.2.0
2539 error code ELIFECYCLE
2540 error errno 1
2541 error grpc@1.10.1 install: `node-pre-gyp install --fallback-to-build --library=static_library`
2541 error Exit status 1
2542 error Failed at the grpc@1.10.1 install script.