Unable to install jest-schematic on Angular 12

[cr1979]

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Describe the bug Installing @briebug/jest with "ng add @briebug/jest" is not working on an existing project. I will receive following errors: PS C:\Users\xxx\development\s4c_update> ng add @briebug/jest

ℹ Using package manager: npm ✔ Found compatible package version: @briebug/[email protected]. ✔ Package information loaded.

The package @briebug/[email protected] will be installed and executed. Would you like to proceed? Yes ✔ Package successfully installed. An unhandled exception occurred: Cannot find module 'C:\Users\xxx\development\s4c_update\node_modules@briebug\jest\src\jest\index' Require stack:

• C:\Users\xxx\development\s4c_update\node_modules@angular\cli\models\schematic-engine-host.js
• C:\Users\xxx\development\s4c_update\node_modules@angular\cli\models\schematic-command.js
• C:\Users\xxx\development\s4c_update\node_modules@angular\cli\commands\add-impl.js
• C:\Users\xxx\development\s4c_update\node_modules@angular-devkit\schematics\tools\export-ref.js
• C:\Users\xxx\development\s4c_update\node_modules@angular-devkit\schematics\tools\index.js
• C:\Users\xxx\development\s4c_update\node_modules@angular\cli\utilities\json-schema.js
• C:\Users\xxx\development\s4c_update\node_modules@angular\cli\models\command-runner.js
• C:\Users\xxx\development\s4c_update\node_modules@angular\cli\lib\cli\index.js
• C:\Users\xxx\AppData\Roaming\npm\node_modules@angular\cli\lib\init.js
• C:\Users\xxx\AppData\Roaming\npm\node_modules@angular\cli\bin\ng See "C:\Users\xxx~1\AppData\Local\Temp\ng-kJFkZe\angular-errors.log" for further details.

To Reproduce Steps to reproduce the behavior: go into a Angular 12 project an

1. Go into an existing Angular 12 project'
2. Run command 'ng add @briebug/jest'
3. See error

Expected behavior Install briebug/jest-schematic

Desktop (please complete the following information):

• OS: Windows 10
• Node version: 15.12.0
• App type Angular CLI
• Angular version [@angular/core: "~12.1.1"]