TypeError: writeFileDelegate is not a function

[samccone]

REPO checkout:
samccone/fried-twinkie#11

yarn install
yarn test

Stack:

/usr/local/google/home/samccone/Desktop/repos/src/tsickle.ts:153
        writeFileDelegate(fileName, content, writeByteOrderMark, onError, sourceFiles);
        ^
TypeError: writeFileDelegate is not a function
    at Object.writeFileImpl [as writeFile] (/usr/local/google/home/samccone/Desktop/repos/src/tsickle.ts:153:9)
    at Object.writeFile (/usr/local/google/home/samccone/Desktop/repos/fried-twinkie/node_modules/typescript/lib/typescript.js:11571:14)
    at printSourceFileOrBundle (/usr/local/google/home/samccone/Desktop/repos/fried-twinkie/node_modules/typescript/lib/typescript.js:83298:16)
    at emitJsFileOrBundle (/usr/local/google/home/samccone/Desktop/repos/fried-twinkie/node_modules/typescript/lib/typescript.js:83183:13)
    at emitSourceFileOrBundle (/usr/local/google/home/samccone/Desktop/repos/fried-twinkie/node_modules/typescript/lib/typescript.js:83115:13)
    at forEachEmittedFile (/usr/local/google/home/samccone/Desktop/repos/fried-twinkie/node_modules/typescript/lib/typescript.js:82907:34)
    at Object.emitFiles (/usr/local/google/home/samccone/Desktop/repos/fried-twinkie/node_modules/typescript/lib/typescript.js:83098:9)
    at emitWorker (/usr/local/google/home/samccone/Desktop/repos/fried-twinkie/node_modules/typescript/lib/typescript.js:89019:33)
    at /usr/local/google/home/samccone/Desktop/repos/fried-twinkie/node_modules/typescript/lib/typescript.js:88979:66
    at runWithCancellationToken (/usr/local/google/home/samccone/Desktop/repos/fried-twinkie/node_modules/typescript/lib/typescript.js:89070:24)
    at Object.emit (/usr/local/google/home/samccone/Desktop/repos/fried-twinkie/node_modules/typescript/lib/typescript.js:88979:20)