Angular CLI 9 RC1: CLI fails to run ngcc after using ng add

[brandonroberts]

🐞 Bug report

Command (mark with an x)

• new
• build
• serve
• test
• e2e
• generate
• add
• update
• lint
• xi18n
• run
• config
• help
• version
• doc

Is this a regression?

Yes, the previous version in which this bug was not present was: ....

Description

A clear and concise description of the problem...

🔬 Minimal Reproduction

Using Angular CLI 9 RC1, Node 12, and yarn 1.19.0

1. ng new myworkspace && cd myworkspace
2. ng add @ngrx/entity
3. Note the error

🔥 Exception or Error

```
brandons-mbp-2:cli9rc11 robertsbt$ ng add @ngrx/entity
Installing packages for tooling via yarn.
An unhandled exception occurred: warning @angular-devkit/build-angular@0.900.0-rc.1: The engine "pnpm" appears to be invalid.
warning @angular-devkit/architect@0.900.0-rc.1: The engine "pnpm" appears to be invalid.
warning @angular-devkit/build-optimizer@0.900.0-rc.1: The engine "pnpm" appears to be invalid.
warning @angular-devkit/build-webpack@0.900.0-rc.1: The engine "pnpm" appears to be invalid.
warning @angular-devkit/core@9.0.0-rc.1: The engine "pnpm" appears to be invalid.
warning @ngtools/webpack@9.0.0-rc.1: The engine "pnpm" appears to be invalid.
warning @angular/cli@9.0.0-rc.1: The engine "pnpm" appears to be invalid.
warning @angular-devkit/schematics@9.0.0-rc.1: The engine "pnpm" appears to be invalid.
warning @schematics/angular@9.0.0-rc.1: The engine "pnpm" appears to be invalid.
warning @schematics/update@0.900.0-rc.1: The engine "pnpm" appears to be invalid.
warning " > @ngrx/effects@8.5.0" has incorrect peer dependency "@angular/core@^8.0.0".
warning " > @ngrx/store@8.5.0" has incorrect peer dependency "@angular/core@^8.0.0".
warning " > @ngrx/entity@8.5.0" has incorrect peer dependency "@angular/core@^8.0.0".
/bin/sh: ngcc: command not found
```

🌍 Your Environment

Angular CLI: 9.0.0-rc.1
Node: 12.10.0
OS: darwin x64
Angular: 9.0.0-rc.1
... animations, cli, common, compiler, compiler-cli, core, forms
... language-service, platform-browser, platform-browser-dynamic
... router

Package                           Version
-----------------------------------------------------------
@angular-devkit/architect         0.900.0-rc.1
@angular-devkit/build-angular     0.900.0-rc.1
@angular-devkit/build-optimizer   0.900.0-rc.1
@angular-devkit/build-webpack     0.900.0-rc.1
@angular-devkit/core              9.0.0-rc.1
@angular-devkit/schematics        9.0.0-rc.1
@ngtools/webpack                  9.0.0-rc.1
@schematics/angular               9.0.0-rc.1
@schematics/update                0.900.0-rc.1
rxjs                              6.5.3
typescript                        3.6.4
webpack                           4.41.2

Anything else relevant?

[alan-agius4]

Should be fixed by #16143

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