npx ember new fails with `Cannot find module './environment'`

The problem:

❯ npx -p ember-cli@3.25.2 ember new my-project -sg -sn -sb -b app --yarn
(node:4218) UnhandledPromiseRejectionWarning: Error: Cannot find module './environment'
Require stack:
- /Users/michal/.npm/_npx/4214/lib/node_modules/ember-cli/node_modules/workerpool/src/index.js
- /Users/michal/.npm/_npx/4214/lib/node_modules/ember-cli/lib/models/asset-size-printer.js
- /Users/michal/.npm/_npx/4214/lib/node_modules/ember-cli/lib/tasks/show-asset-sizes.js
- /Users/michal/.npm/_npx/4214/lib/node_modules/ember-cli/lib/utilities/require-as-hash.js
- /Users/michal/.npm/_npx/4214/lib/node_modules/ember-cli/lib/cli/index.js
- /Users/michal/.npm/_npx/4214/lib/node_modules/ember-cli/bin/ember
    at Function.Module._resolveFilename (internal/modules/cjs/loader.js:880:15)
    at Function.Module._load (internal/modules/cjs/loader.js:725:27)
    at Module.require (internal/modules/cjs/loader.js:952:19)
    at require (internal/modules/cjs/helpers.js:88:18)
    at Object.<anonymous> (/Users/michal/.npm/_npx/4214/lib/node_modules/ember-cli/node_modules/workerpool/src/index.js:1:19)
    at Module._compile (internal/modules/cjs/loader.js:1063:30)
    at Object.Module._extensions..js (internal/modules/cjs/loader.js:1092:10)
    at Module.load (internal/modules/cjs/loader.js:928:32)
    at Function.Module._load (internal/modules/cjs/loader.js:769:14)
    at Module.require (internal/modules/cjs/loader.js:952:19)
(Use `node --trace-warnings ...` to show where the warning was created)
(node:4218) UnhandledPromiseRejectionWarning: Unhandled promise rejection. This error originated either by throwing inside of an async function without a catch block, or by rejecting a promise which was not handled with .catch(). To terminate the node process on unhandled promise rejection, use the CLI flag `--unhandled-rejections=strict` (see https://nodejs.org/api/cli.html#cli_unhandled_rejections_mode). (rejection id: 2)
(node:4218) [DEP0018] DeprecationWarning: Unhandled promise rejections are deprecated. In the future, promise rejections that are not handled will terminate the Node.js process with a non-zero exit code.

I tried to go down on minor versions and 3.20.x (3.20.2) is first one that works for me:

❯ npx -p ember-cli@3.20.0 ember new my-project -sg -sn -sb -b app --yarn
installing app
Ember CLI v3.20.0

✨  Creating a new Ember app in /Users/michal/ember/my-project:
  create .editorconfig
  create .ember-cli
  create .eslintignore
  create .eslintrc.js
  create .template-lintrc.js
  create .travis.yml
  create .watchmanconfig
  create README.md
  create app/app.js
  create app/components/.gitkeep
  create app/controllers/.gitkeep
  create app/helpers/.gitkeep
  create app/index.html
  create app/models/.gitkeep
  create app/router.js
  create app/routes/.gitkeep
  create app/styles/app.css
  create app/templates/application.hbs
  create config/ember-cli-update.json
  create config/environment.js
  create config/optional-features.json
  create config/targets.js
  create ember-cli-build.js
  create .gitignore
  create package.json
  create public/robots.txt
  create testem.js
  create tests/helpers/.gitkeep
  create tests/index.html
  create tests/integration/.gitkeep
  create tests/test-helper.js
  create tests/unit/.gitkeep
  create vendor/.gitkeep

🎉  Successfully created project my-project.
👉   Get started by typing:

  $ cd my-project
  $ yarn start

Happy coding!

Why am I trying this? The command is actually extracted from ember-cli-update run. Which is failing on me.

I’m not sure what happened, successfully updated one app and second one failed. Now even if I go back in git history it fails on me. I think this started after I did global update of ember-cli.

I tried to wipe global npx cache:

trash ~/.npm/_npx

I tried different versions of node, removing volta re-installing global ember-cli, removing node_modules of the app (during ember-cli-update run).

---

Output from ember version --verbose && npm --version && yarn --version:

❯ ember version --verbose
ember-cli: 3.19.0
node: 14.16.0
v8: 8.4.371.19-node.18
uv: 1.40.0
zlib: 1.2.11
brotli: 1.0.9
ares: 1.16.1
modules: 83
nghttp2: 1.41.0
napi: 7
llhttp: 2.1.3
openssl: 1.1.1j
cldr: 37.0
icu: 67.1
tz: 2020a
unicode: 13.0
os: darwin x64

❯ npm --version
6.14.11

❯ yarn --version
1.22.10

[cecemel]

Just bumped into the same problem

[NullVoxPopuli]

I ran in to this, too 😄