https://qiita.com/TakahiRoyte/items/c152ad8baa191ed1f8ae
解決
npm install --save cross-env
https://qiita.com/rema424/items/9306e96307d0814dc57b
[vagrant@localhost projectname]$ yarn dev yarn run v1.22.4 $ cross-env NODE_ENV=development nuxt-ts events.js:170 throw er; // Unhandled 'error' event ^ Error: spawn nuxt-ts ENOENT at Process.ChildProcess._handle.onexit (internal/child_process.js:247:19) at onErrorNT (internal/child_process.js:429:16) at processTicksAndRejections (internal/process/task_queues.js:81:17) at process.runNextTicks [as _tickCallback] (internal/process/task_queues.js:56:3) at Function.Module.runMain (internal/modules/cjs/loader.js:880:11) at internal/main/run_main_module.js:21:11 Emitted 'error' event at: at Process.ChildProcess._handle.onexit (internal/child_process.js:253:12) at onErrorNT (internal/child_process.js:429:16) [... lines matching original stack trace ...] at internal/main/run_main_module.js:21:11 error Command failed with exit code 1. info Visit https://yarnpkg.com/en/docs/cli/run for documentation about this command.