Angular-cli: Angular 9.1.0 Fresh library project fails to build.

[niteshpurohit]

🐞 Bug report

Command (mark with an x)

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

Is this a regression?

Happen'd first time. Existing libraries updated to 9.1.0 builds without a problem.
But Newly created after i update CLI to 9.1.0 shows me above error on building. Building regular application works thou.

Description

Unable to build library project for freshly generated library project using cli 9.1.0

🔬 Minimal Reproduction

ng new my-lib-project --create-application=false
cd my-lib-project
ng generate library my-lib
ng build my-lib <=== ERROR

Repo: https://github.com/niteshpurohit/angular-cli-error-example-repo

🔥 Exception or Error

ng build my-lib

An unhandled exception occurred: Package exports for '**/my-lib-project/node_modules/ng-packagr/node_modules/rollup' do not define a valid '.' target
See "/private/var/folders/ln/_gz8v98j4dx0sv4zvm38_sw80000gn/T/ng-4DqbHq/angular-errors.log" for further details.

[error] Error: Package exports for **/my-lib-project/node_modules/ng-packagr/node_modules/rollup' do not define a valid '.' target
    at resolveExportsTarget (internal/modules/cjs/loader.js:545:13)
    at applyExports (internal/modules/cjs/loader.js:459:14)
    at resolveExports (internal/modules/cjs/loader.js:508:12)
    at Function.Module._findPath (internal/modules/cjs/loader.js:577:20)
    at Function.Module._resolveFilename (internal/modules/cjs/loader.js:879:27)
    at Function.Module._load (internal/modules/cjs/loader.js:785:27)
    at Module.require (internal/modules/cjs/loader.js:956:19)
    at require (internal/modules/cjs/helpers.js:74:18)
    at Object. (/**/my-lib-project/node_modules/ng-packagr/lib/flatten/rollup.js:12:16)
    at Module._compile (internal/modules/cjs/loader.js:1063:30)

🌍 Your Environment

     _                      _                 ____ _     ___
    / \   _ __   __ _ _   _| | __ _ _ __     / ___| |   |_ _|
   / △ \ | '_ \ / _` | | | | |/ _` | '__|   | |   | |    | |
  / ___ \| | | | (_| | |_| | | (_| | |      | |___| |___ | |
 /_/   \_\_| |_|\__, |\__,_|_|\__,_|_|       \____|_____|___|
                |___/


Angular CLI: 9.1.0
Node: 13.1.0
OS: darwin x64

Angular: 9.1.0
... animations, cli, common, compiler, compiler-cli, core, forms
... language-service, platform-browser, platform-browser-dynamic
... router
Ivy Workspace: Yes

Package                            Version
------------------------------------------------------------
@angular-devkit/architect          0.901.0
@angular-devkit/build-angular      0.901.0
@angular-devkit/build-ng-packagr   0.901.0
@angular-devkit/build-optimizer    0.901.0
@angular-devkit/build-webpack      0.901.0
@angular-devkit/core               9.1.0
@angular-devkit/schematics         9.1.0
@ngtools/webpack                   9.1.0
@schematics/angular                9.1.0
@schematics/update                 0.901.0
ng-packagr                         9.1.0
rxjs                               6.5.5
typescript                         3.8.3
webpack                            4.42.0

[clydin]

Node.js 13.0 and 13.1 do not support the latest specification for the exports field. Please consider updating to 13.2+ (13.12 is the latest).

[niteshpurohit]

Seems its working with 13.2.0. Thanks for your help.

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