🐞 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, this command did not generate errors using Angular 8

Description

We have renamed the production build configuration to “release” in our angular.json file for internal consistency. Prior to upgrading to Angular 9 this worked without issue. Now when we run ng build -c=release --prod --aot we get the following error.

An unhandled exception occurred: Configuration 'production' is not set in the workspace.

While we can rename our release configuration to production we have a lot of projects and it breaks our internal naming convention. Since it was working prior to the upgrade we thought it was worth bringing up here before we refactor.

🔬 Minimal Reproduction

Create a new Angular project using the CLI. Rename the production build configuration to release (or anything else). Run ng build -c=release --prod --aot Get Error

🔥 Exception or Error

An unhandled exception occurred: Configuration 'production' is not set in the workspace.

🌍 Your Environment

Angular CLI: 9.0.2
Node: 10.15.0
OS: win32 x64

Angular: 9.0.1
... animations, common, compiler, compiler-cli, core, forms
... language-service, localize, platform-browser
... platform-browser-dynamic, router
Ivy Workspace: Yes

Package                           Version
-----------------------------------------------------------
@angular-devkit/architect         0.900.2
@angular-devkit/build-angular     0.900.2
@angular-devkit/build-optimizer   0.900.2
@angular-devkit/build-webpack     0.900.2
@angular-devkit/core              9.0.2
@angular-devkit/schematics        9.0.2
@angular/cli                      9.0.2
@ngtools/webpack                  9.0.2
@schematics/angular               9.0.2
@schematics/update                0.900.2
rxjs                              6.5.3
typescript                        3.7.5
webpack                           4.41.2

Anything else relevant? Shouldn’t be anything else.