node-gyp rebuild failed!

[Deleted user]

trying to update speaker, but it fails..

328 verbose stack Error: speaker@0.3.1 install: node-gyp rebuild
328 verbose stack Exit status 1
328 verbose stack at EventEmitter. (/usr/local/lib/node_modules/npm/node_modules/npm-lifecycle/index.js:280:16)
328 verbose stack at emitTwo (events.js:125:13)
328 verbose stack at EventEmitter.emit (events.js:213:7)
328 verbose stack at ChildProcess. (/usr/local/lib/node_modules/npm/node_modules/npm-lifecycle/lib/spawn.js:55:14)
328 verbose stack at emitTwo (events.js:125:13)
328 verbose stack at ChildProcess.emit (events.js:213:7)
328 verbose stack at maybeClose (internal/child_process.js:927:16)
328 verbose stack at Process.ChildProcess._handle.onexit (internal/child_process.js:211:5)
329 verbose pkgid speaker@0.3.1
330 verbose cwd /Users/xxx/xxx
331 verbose Darwin 16.7.0
332 verbose argv "/usr/local/bin/node" "/usr/local/bin/npm" "install" "speaker" "--save"
333 verbose node v8.7.0
334 verbose npm v5.4.2
335 error code ELIFECYCLE
336 error errno 1
337 error speaker@0.3.1 install: node-gyp rebuild
337 error Exit status 1
338 error Failed at the speaker@0.3.1 install script.
338 error This is probably not a problem with npm. There is likely additional logging output above.
339 verbose exit [ 1, true ]