For others who might find this in regards to install a snapshot build: I only got it running with npm i git://github.com/angular/compiler-cli-builds.git#be5a9df8d5759975533849e268b4191c5465efec just using the URL in the package.json gave me some errors like

npm ERR! code ENOPACKAGEJSON
npm ERR! package.json Non-registry package missing package.json: https://github.com/angular/compiler-cli-builds/tree/be5a9df8d5759975533849e268b4191c5465efec.
npm ERR! package.json npm can't find a package.json file in your current directory.

@petebacondarwin Thanks for your awesome work our monorepo built successfully with ivy for the first time 🎉 💪 this is awesome. The documentation app for our library went down from 3,4 to 2,3 MB in bundle size. You guys are really awesome! 🙏

Guys, i have some solution but im not sure how currect it is.

1. "buildOptimizer": false,
2. "enableIvy": true
3. "aot": false,

Before do this refactoring, application size is: 18 440KB; After: 17 887KB

I can confirm that #35227 also fixes this locally for me.

@Phil147 oh, sorry! I meant #34500, not #34508.

So glad to here it!

Yes you can! Try using this URL as the npm source in your package.json: https://github.com/angular/compiler-cli-builds#be5a9df8d5759975533849e268b4191c5465efec

@petebacondarwin cool thanks for that quick fix 🎉 Is there any way to use the build artifacts of the PR to test it against our production repository?

I think this might be a duplicate of https://github.com/angular/angular/issues/35188#issuecomment-583290309

Hi @alxhub thanks for your answer! Happy to hear that a fix is on the way. 🎉 The PR you linked is about zonejs is this really related to this issue? I would love to track the original issue 👍

This is an instance (duplicate) of #34500. A fix is in the works!

we have the same issue in our app. we have set of libraries packaged (ng-packagr with --prod and enableIvy false) and published to internal npm registry. then consumed by our app. we migrated our app and library projects to v9 but when consumed through the npm packages it fails with above errors.

i also noticed that output esm2015 and fesm2015 scripts have differences compared to v8 output. v8 esm2015 module file. not sure if this causing the error (need to check later)

/**
 * @fileoverview added by tsickle
 * Generated from: http2Module.ts
 * @suppress {checkTypes,constantProperty,extraRequire,missingOverride,missingReturn,unusedPrivateMembers,uselessCode} checked by tsc
 */
import { HttpClientJsonpModule, HttpClientModule } from '@angular/common/http';
import { NgModule } from '@angular/core';
import { CoreModule } from '@anthem/mbrportal/core';
import { HttpClient2 } from './services/httpClient2';
import { UrlHelper } from './services/urlHelper';
export class Http2Module {
    /**
     * @return {?}
     */
    static forRoot() {
        return {
            ngModule: Http2Module,
            providers: [UrlHelper, HttpClient2]
        };
    }
}
Http2Module.decorators = [
    { type: NgModule, args: [{
                imports: [HttpClientModule, CoreModule, HttpClientJsonpModule],
                declarations: [],
                entryComponents: [],
                exports: []
            },] }
];

v9 esm2015 module file

var __decorate = (this && this.__decorate) || function (decorators, target, key, desc) {
    var c = arguments.length, r = c < 3 ? target : desc === null ? desc = Object.getOwnPropertyDescriptor(target, key) : desc, d;
    if (typeof Reflect === "object" && typeof Reflect.decorate === "function") r = Reflect.decorate(decorators, target, key, desc);
    else for (var i = decorators.length - 1; i >= 0; i--) if (d = decorators[i]) r = (c < 3 ? d(r) : c > 3 ? d(target, key, r) : d(target, key)) || r;
    return c > 3 && r && Object.defineProperty(target, key, r), r;
};
var Http2Module_1;
import { HttpClientJsonpModule, HttpClientModule } from '@angular/common/http';
import { NgModule } from '@angular/core';
import { CoreModule } from '@anthem/mbrportal/core';
import { HttpClient2 } from './services/httpClient2';
import { UrlHelper } from './services/urlHelper';
let Http2Module = Http2Module_1 = class Http2Module {
    static forRoot() {
        return {
            ngModule: Http2Module_1,
            providers: [UrlHelper, HttpClient2]
        };
    }
};
Http2Module = Http2Module_1 = __decorate([
    NgModule({
        imports: [HttpClientModule, CoreModule, HttpClientJsonpModule],
        declarations: [],
        exports: []
    })
], Http2Module);
export { Http2Module };