Define build option does not define values for prebundling

[HazzMan2409]

Command

serve

Is this a regression?

• Yes, this behavior used to work in the previous version

The previous version in which this bug was not present was

No response

Description

The define build option is not passed on for prebundling https://github.com/angular/angular-cli/blob/main/packages/angular/build/src/tools/vite/utils.ts#L101 and so library code that relies on a global variable being set cannot be prebundled.

Minimal Reproduction

Pre-bundle a library that relies on a global.

Exception or Error

Your Environment

Angular CLI: 19.0.6
Node: 20.12.1
Package Manager: npm 10.5.0
OS: darwin arm64

Angular: 19.0.5
... animations, common, compiler, compiler-cli, core, forms
... platform-browser, platform-browser-dynamic, router

Package                         Version
---------------------------------------------------------
@angular-devkit/architect       0.1900.6
@angular-devkit/build-angular   19.0.6
@angular-devkit/core            19.0.6
@angular-devkit/schematics      19.0.6
@angular/cli                    19.0.6
@schematics/angular             19.0.6
rxjs                            7.8.1
typescript                      5.6.3
zone.js                         0.15.0

Anything else relevant?

No response

[alan-agius4]

Actually this is slightly different.