Unable to select CodePipeline as source

Question

I am a Cloud Engineer in a company and I have been assigned to move their resources from their old AWS account to a new one. A lot of things are trivial but I am finding a lot of problems with CodeBuild/CodePipeline and similar, as there is no proper way to export-import.

The main problem I am facing right now is that in the old AWS account (same region), I am able to select CodePipeline as a source for my CodeBuild project. However, I can not do it in the new one. If I check the docs online, there is no reference to CodePipeline being available as a source, but if I check the CLI I can clearly see it is available. I'll put some pics at the end.

Is there any way to create a new project using CodePipeline? It is driving me crazy.

Old AWS Account - Editing the CodeBuild project

New AWS Account - Creating a new CodeBuild project

Detail of the CLI docs - CODEPIPELINE is available

Detail of the web docs - CodePipeline is not available

Answer 1

Solved by myself. You can not create a CodeBuild with CodePipeline as a source directly. To achieve it, you have to run the process with the inverse approach.

Create a CodePipeline project and, once connected a source, you are going to get asked about adding a build step. If you accept it, the new step is going to be a CodeBuild project, using your recently created CodePipeline as a source.