can't build on mac

[leofle]

when i'm trying to build on a macbook pro i'm getting this error:

> babel-node scripts/build-cli.js

{"_":[],"h":false,"sigma-only":false,"sigmaOnly":false,"verbose":false,"dev":false,"stats":false,"$0":"scripts/build-cli.js"}
Building: sigma
Building: npm module
Building: es module
Built: npm module
Built: es module
Built: sigma
Building: distributable
ChildProcessError: Command failed: webpack --bail -p
(node:52636) DeprecationWarning: loaderUtils.parseQuery() received a non-string value which can be problematic, see https://github.com/webpack/loader-utils/issues/56
parseQuery() will be replaced with getOptions() in the next major version of loader-utils.
 `webpack --bail -p` (exited with error code 2)
    at callback (/Users/lio.fleishman/sisense-react-sigma/node_modules/child-process-promise/lib/index.js:33:27)
    at ChildProcess.exithandler (child_process.js:282:5)
    at emitTwo (events.js:126:13)
    at ChildProcess.emit (events.js:214:7)
    at maybeClose (internal/child_process.js:925:16)
    at Process.ChildProcess._handle.onexit (internal/child_process.js:209:5)
npm ERR! code ELIFECYCLE
npm ERR! errno 1
npm ERR! react-sigma@1.2.29 build: `babel-node scripts/build-cli.js`
npm ERR! Exit status 1
npm ERR!
npm ERR! Failed at the react-sigma@1.2.29 build script.
npm ERR! This is probably not a problem with npm. There is likely additional logging output above.