Command yarn tscw fails

Hi, I'm following this tutorial page https://duniter.org/fr/wiki/duniter/tutoriel-dev/chapitre-4-demarrage/ , and when I run yarn tsc there is no problem, but when I run yarn tscw I get the following output:

$ yarn tscw
yarn run v1.3.2
$ tsc -w
fs.js:1376
    throw error;
    ^

Error: watch /home/quentin/prog/duniter/typescript/duniter EMFILE
    at _errnoException (util.js:1024:11)
    at FSWatcher.start (fs.js:1374:19)
    at Object.fs.watch (fs.js:1400:11)
    at watchPresentDirectory (/home/quentin/prog/duniter/typescript/duniter/node_modules/typescript/lib/tsc.js:2635:42)
    at fsWatchDirectory (/home/quentin/prog/duniter/typescript/duniter/node_modules/typescript/lib/tsc.js:2620:21)
    at Object.watchDirectory (/home/quentin/prog/duniter/typescript/duniter/node_modules/typescript/lib/tsc.js:2768:28)
    at addDirectoryWatcher (/home/quentin/prog/duniter/typescript/duniter/node_modules/typescript/lib/tsc.js:56930:21)
    at Object.watchDirectory (/home/quentin/prog/duniter/typescript/duniter/node_modules/typescript/lib/tsc.js:59955:20)
    at createDirectoryWatcher (/home/quentin/prog/duniter/typescript/duniter/node_modules/typescript/lib/tsc.js:59381:35)
    at watchFailedLookupLocationOfResolution (/home/quentin/prog/duniter/typescript/duniter/node_modules/typescript/lib/tsc.js:59348:81)
error Command failed with exit code 1.
info Visit https://yarnpkg.com/en/docs/cli/run for documentation about this command.

And I can't find util.js and fs.js files that are mentioned in the error. Any idea?