Is it darn yarn or is it blinking npm that you are supposed to use to start a react app up

C:\Users\pierc\dev\react-flow>npx create-react-app my-app

Creating a new React app in C:\Users\pierc\dev\react-flow\my-app.

warning ..\..\..\package.json: No license field
Installing packages. This might take a couple of minutes.
Installing react, react-dom, and react-scripts with cra-template...

yarn add v1.22.5
warning ..\..\..\package.json: No license field
[1/4] Resolving packages...
[2/4] Fetching packages...
info fsevents@1.2.13: The platform "win32" is incompatible with this module.
info "fsevents@1.2.13" is an optional dependency and failed compatibility check. Excluding it from installation.
info fsevents@2.3.2: The platform "win32" is incompatible with this module.
info "fsevents@2.3.2" is an optional dependency and failed compatibility check. Excluding it from installation.
[3/4] Linking dependencies...
warning "react-scripts > @typescript-eslint/eslint-plugin > tsutils@3.20.0" has unmet peer dependency "typescript@>=2.8.0 || >= 3.2.0-dev || >= 3.3.0-dev || >= 3.4.0-dev || >= 3.5.0-dev || >= 3.6.0-dev || >= 3.6.0-beta || >= 3.7.0-dev || >= 3.7.0-beta".
[4/4] Building fresh packages...
success Saved lockfile.
success Saved 7 new dependencies.
info Direct dependencies
├─ cra-template@1.1.2
├─ react-dom@17.0.2
├─ react-scripts@4.0.3
└─ react@17.0.2
info All dependencies
├─ cra-template@1.1.2
├─ immer@8.0.1
├─ react-dev-utils@11.0.4
├─ react-dom@17.0.2
├─ react-scripts@4.0.3
├─ react@17.0.2
└─ scheduler@0.20.2
Done in 29.27s.

Initialized a git repository.

Installing template dependencies using yarnpkg...
yarn add v1.22.5
warning ..\..\..\package.json: No license field
[1/4] Resolving packages...
[2/4] Fetching packages...
info fsevents@2.3.2: The platform "win32" is incompatible with this module.
info "fsevents@2.3.2" is an optional dependency and failed compatibility check. Excluding it from installation.
info fsevents@1.2.13: The platform "win32" is incompatible with this module.
info "fsevents@1.2.13" is an optional dependency and failed compatibility check. Excluding it from installation.
[3/4] Linking dependencies...
warning "react-scripts > @typescript-eslint/eslint-plugin > tsutils@3.20.0" has unmet peer dependency "typescript@>=2.8.0 || >= 3.2.0-dev || >= 3.3.0-dev || >= 3.4.0-dev || >= 3.5.0-dev || >= 3.6.0-dev || >= 3.6.0-beta || >= 3.7.0-dev || >= 3.7.0-beta".
warning " > @testing-library/user-event@12.8.3" has unmet peer dependency "@testing-library/dom@>=7.21.4".
[4/4] Building fresh packages...
success Saved lockfile.
success Saved 16 new dependencies.
info Direct dependencies
├─ @testing-library/jest-dom@5.16.0
├─ @testing-library/react@11.2.7
├─ @testing-library/user-event@12.8.3
├─ react-dom@17.0.2
├─ react@17.0.2
└─ web-vitals@1.1.2
info All dependencies
├─ @testing-library/dom@7.31.2
├─ @testing-library/jest-dom@5.16.0
├─ @testing-library/react@11.2.7
├─ @testing-library/user-event@12.8.3
├─ @types/aria-query@4.2.2
├─ @types/jest@27.0.3
├─ @types/testing-library__jest-dom@5.14.2
├─ css.escape@1.5.1
├─ css@3.0.0
├─ lz-string@1.4.4
├─ min-indent@1.0.1
├─ react-dom@17.0.2
├─ react@17.0.2
├─ redent@3.0.0
├─ strip-indent@3.0.0
└─ web-vitals@1.1.2
Done in 13.59s.
Removing template package using yarnpkg...

yarn remove v1.22.5
warning ..\..\..\package.json: No license field
[1/2] Removing module cra-template...
[2/2] Regenerating lockfile and installing missing dependencies...
info fsevents@2.3.2: The platform "win32" is incompatible with this module.
info "fsevents@2.3.2" is an optional dependency and failed compatibility check. Excluding it from installation.
info fsevents@1.2.13: The platform "win32" is incompatible with this module.
info "fsevents@1.2.13" is an optional dependency and failed compatibility check. Excluding it from installation.
warning " > @testing-library/user-event@12.8.3" has unmet peer dependency "@testing-library/dom@>=7.21.4".
warning "react-scripts > @typescript-eslint/eslint-plugin > tsutils@3.20.0" has unmet peer dependency "typescript@>=2.8.0 || >= 3.2.0-dev || >= 3.3.0-dev || >= 3.4.0-dev || >= 3.5.0-dev || >= 3.6.0-dev || >= 3.6.0-beta || >= 3.7.0-dev || >= 3.7.0-beta".
success Uninstalled packages.
Done in 8.94s.

Created git commit.

Success! Created my-app at C:\Users\pierc\dev\react-flow\my-app
Inside that directory, you can run several commands:

  yarn start
    Starts the development server.

  yarn build
    Bundles the app into static files for production.

  yarn test
    Starts the test runner.

  yarn eject
    Removes this tool and copies build dependencies, configuration files
    and scripts into the app directory. If you do this, you can’t go back!

We suggest that you begin by typing:

  cd my-app
  yarn start

Happy hacking!