yarn run build error

[mohit61]

yarn run build is giving error

After cloning the react-bootstrap repository, I did yarn yarn run bootstrap then I did yarn run build to compile the code but it give me following error

Building targets: all

Building: commonjs modules
Building: es modules
Building: browser distributable
TypeError: execa.shell is not a function
    at shell (/home/mohit/Desktop/TATTLE/main/shell3-in-1/react-bootstrap/tools/build.js:26:28)
    at step (/home/mohit/Desktop/TATTLE/main/shell3-in-1/react-bootstrap/tools/build.js:37:9)
    at /home/mohit/Desktop/TATTLE/main/shell3-in-1/react-bootstrap/tools/build.js:22:9
    at Object.<anonymous> (/home/mohit/Desktop/TATTLE/main/shell3-in-1/react-bootstrap/tools/build.js:80:17)
    at Module._compile (internal/modules/cjs/loader.js:689:30)
    at Object.Module._extensions..js (internal/modules/cjs/loader.js:700:10)
    at Module.load (internal/modules/cjs/loader.js:599:32)
    at tryModuleLoad (internal/modules/cjs/loader.js:538:12)
    at Function.Module._load (internal/modules/cjs/loader.js:530:3)
    at Function.Module.runMain (internal/modules/cjs/loader.js:742:12)
npm ERR! code ELIFECYCLE
npm ERR! errno 1
npm ERR! react-bootstrap@1.0.0-beta.9 build: `node tools/build.js`
npm ERR! Exit status 1
npm ERR! 
npm ERR! Failed at the react-bootstrap@1.0.0-beta.9 build script.
npm ERR! This is probably not a problem with npm. There is likely additional logging output above.

npm ERR! A complete log of this run can be found in:```

[mxschmitt]

Caused by #3952 Feel free to submit a PR if you want. Or if not, just ping us and we will.