building custom stacks

[atdhcs]

@mkuznyetsov
I was trying to learn how to build custom stacks so I used "generate" to generate a custom assembly folder using the below command
docker run -it --rm -v /var/run/docker.sock:/var/run/docker.sock -v /c/archetype:/archetype -v /c/tmp:/data -v /c/Users/User/.m2/repository:/m2 eclipse/che:6.0.0-M2 archetype generate --archid=stacks-archetype --che

Command ran into success and ran "build" command without any changes to the folder using the below command and got following error. Can you please tell me why i'm getting this error.

docker run -it --rm -v /var/run/docker.sock:/var/run/docker.sock -v /c/archetype:/archetype -v /c/tmp:/data -v /c/Users/User/.m2/repository:/m2 eclipse/che:6.0.0-M2 archetype build --archid=stacks-archetype --che
and got the error

[ERROR] [ERROR] Could not find the selected project in the reactor: com.sample.che:assembly-main @

# ### [ERROR] Could not find the selected project in the reactor: com.sample.che:assembly-main -> [Help 1]

here is the link https://www.eclipse.org/che/docs/devops/runtime-stacks/index.html I used as model to add stacks to custom assembly
@mkuznyet