Angular 9 build failed

Bug Report

What is the expected behavior?

$ ng update
$ ng build

[2] 
[2] Compiling @angular/material/button : es2015 as esm2015
[2] 
[2] Compiling @angular/cdk/layout : es2015 as esm2015
[2] 
[2] Compiling @angular/material/snack-bar : es2015 as esm2015
[2] 
[2] Compiling @angular/material/dialog : es2015 as esm2015
[2] 
[2] Compiling @angular/flex-layout/core : es2015 as esm2015
[2] 
[2] Compiling @angular/flex-layout/extended : es2015 as esm2015
[2] 
[2] Compiling @angular/flex-layout/flex : es2015 as esm2015
[2] 
[2] Compiling @angular/flex-layout/grid : es2015 as esm2015
[2] 

[2] ERROR in Failed to compile entry-point @angular/flex-layout (es2015 as esm2015) due to compilation errors:
[2] ../../../../cloud-user/ui-packages/node_modules/@angular/flex-layout/flex/typings/module.d.ts:6:22 - error NG6002: Appears in the NgModule.imports of FlexLayoutModule, but could not be resolved to an NgModule class
[2] 
[2] 6 export declare class FlexModule {
[2]                        ~~~~~~~~~~
[2] ../../../../cloud-user/ui-packages/node_modules/@angular/flex-layout/extended/typings/module.d.ts:6:22 - error NG6002: Appears in the NgModule.imports of FlexLayoutModule, but could not be resolved to an NgModule class
[2] 
[2] 6 export declare class ExtendedModule {
[2]                        ~~~~~~~~~~~~~~
[2] ../../../../cloud-user/ui-packages/node_modules/@angular/flex-layout/grid/typings/module.d.ts:6:22 - error NG6002: Appears in the NgModule.imports of FlexLayoutModule, but could not be resolved to an NgModule class
[2] 
[2] 6 export declare class GridModule {
[2]                        ~~~~~~~~~~
[2] ../../../../cloud-user/ui-packages/node_modules/@angular/flex-layout/flex/typings/module.d.ts:6:22 - error NG6003: Appears in the NgModule.exports of FlexLayoutModule, but could not be resolved to an NgModule, Component, Directive, or Pipe class
[2] 
[2] 6 export declare class FlexModule {
[2]                        ~~~~~~~~~~
[2] ../../../../cloud-user/ui-packages/node_modules/@angular/flex-layout/extended/typings/module.d.ts:6:22 - error NG6003: Appears in the NgModule.exports of FlexLayoutModule, but could not be resolved to an NgModule, Component, Directive, or Pipe class
[2] 
[2] 6 export declare class ExtendedModule {
[2]                        ~~~~~~~~~~~~~~
[2] ../../../../cloud-user/ui-packages/node_modules/@angular/flex-layout/grid/typings/module.d.ts:6:22 - error NG6003: Appears in the NgModule.exports of FlexLayoutModule, but could not be resolved to an NgModule, Component, Directive, or Pipe class
[2] 
[2] 6 export declare class GridModule {
[2]                        ~~~~~~~~~~
[2] 
[2] error Command failed with exit code 1.
[2] info Visit https://yarnpkg.com/en/docs/cli/run for documentation about this command.
[2] yarn build.test exited with code 1

[srilek]

Hi , I also faced the similar issue but I updated the flex-layout component (npm install @angular/flex-layout@latest --save) and served it again ,it worked for me . My angular version and flex-layout version is as below “@angular/animations”: “^9.0.7”, “@angular/cdk”: “^9.2.0”, “@angular/common”: “~9.0.3”, “@angular/compiler”: “~9.0.3”, “@angular/core”: “~9.0.3”, “@angular/flex-layout”: “^9.0.0-beta.29”,

[adamdport]

@CaerusKaru I

• deleted node modules in my project, in my library, and in my library’s project folder
• deleted the output (/dist) folder in my project and in my library
• cleared my npm cache
• updated npm modules in my project and library (now on 9.0.4)

It looks like Angular changed the error message slightly but it’s just a more verbose version of the same thing:

ERROR in Failed to compile entry-point @angular/flex-layout (es2015 as esm2015) due to compilation errors:
../../../common-angular-workspace/node_modules/@angular/flex-layout/flex/typings/module.d.ts:6:22 - error NG6002: Appears in the NgModule.imports of FlexLayoutModule, but could not be resolved to an NgModule class.

This likely means that the library (@angular/flex-layout/flex) which declares FlexModule has not been processed correctly by ngcc, or is not compatible with Angular Ivy. Check if a newer version of the library is available, and update if so. Also consider checking with the library's authors to see if the library is expected to be compatible with Ivy.

6 export declare class FlexModule {
                       ~~~~~~~~~~
../../../common-angular-workspace/node_modules/@angular/flex-layout/extended/typings/module.d.ts:6:22 - error NG6002: Appears in the NgModule.imports of FlexLayoutModule, but could not be resolved to an NgModule class.

This likely means that the library (@angular/flex-layout/extended) which declares ExtendedModule has not been processed correctly by ngcc, or is not compatible with Angular Ivy. Check if a
newer version of the library is available, and update if so. Also consider checking with the library's authors to see if the library is expected to be compatible with Ivy.

6 export declare class ExtendedModule {
                       ~~~~~~~~~~~~~~
../../../common-angular-workspace/node_modules/@angular/flex-layout/grid/typings/module.d.ts:6:22 - error NG6002: Appears in the NgModule.imports of FlexLayoutModule, but could not be resolved to an NgModule class.

This likely means that the library (@angular/flex-layout/grid) which declares GridModule has not been processed correctly by ngcc, or is not compatible with Angular Ivy. Check if a newer version of the library is available, and update if so. Also consider checking with the library's authors to see if the library is expected to be compatible with Ivy.

6 export declare class GridModule {
                       ~~~~~~~~~~
../../../common-angular-workspace/node_modules/@angular/flex-layout/flex/typings/module.d.ts:6:22 - error NG6003: Appears in the NgModule.exports of FlexLayoutModule, but could not be resolved to an NgModule, Component, Directive, or Pipe class.

This likely means that the library (@angular/flex-layout/flex) which declares FlexModule has not been processed correctly by ngcc, or is not compatible with Angular Ivy. Check if a newer version of the library is available, and update if so. Also consider checking with the library's authors to see if the library is expected to be compatible with Ivy.

6 export declare class FlexModule {
                       ~~~~~~~~~~
../../../common-angular-workspace/node_modules/@angular/flex-layout/extended/typings/module.d.ts:6:22 - error NG6003: Appears in the NgModule.exports of FlexLayoutModule, but could not be resolved to an NgModule, Component, Directive, or Pipe class.

This likely means that the library (@angular/flex-layout/extended) which declares ExtendedModule has not been processed correctly by ngcc, or is not compatible with Angular Ivy. Check if a
newer version of the library is available, and update if so. Also consider checking with the library's authors to see if the library is expected to be compatible with Ivy.

6 export declare class ExtendedModule {
                       ~~~~~~~~~~~~~~
../../../common-angular-workspace/node_modules/@angular/flex-layout/grid/typings/module.d.ts:6:22 - error NG6003: Appears in the NgModule.exports of FlexLayoutModule, but could not be resolved to an NgModule, Component, Directive, or Pipe class.

Flex layout is a peer dependency in my library along with all the other common angular dependencies. I can try putting together a reproduction repo if that would be helpful?