QtCreator: use scp within Custom Process Step - qt

Question

I want to setup Qt in such a way that the sources or rather the whole project directory will be copied using scp as Custom Process Step within the Deployment. The sources will be translated later by the target machine itself. At the terminal this works well:
setsid scp -r . <user>#<host>:<path>
setsid asks for the password needed by ssh with a graphical prompt.
What is the correct parameter to get the project path as working directory?
How to avoid the following error?
Could not start process "setsid scp -r . <user>#<host>:<path>"
Error while building/deploying project MyProject (kit: Desktop Qt 5.10.0 GCC 64bit2)
When executing step "Custom Process Step"
The current settings of Custom Process Step:
Command: setsid scp -r . <user>#<host>:<path>
Arguments: left empty
Working directory: %{buildDir} I know - this is wrong

Answer 1

This is my working setting:
Deployment
Command:
setsid
Arguments:
scp -r . user#<host>:<path>
Working directory:
%{CurrentProject:Path}
When hit the Build button (Ctrl+B), a prompt asks for the password needed by scp, then the files will copied as specified in Arguments and in Working directory. In this case, the whole project folder will be copied.
Run
Command:
setsid
Arguments:
ssh -t user#<host> <command>
Working directory:
.
When hit the Run button (Ctrl+R), a prompt asks for the password needed by ssh, then the command will executed as specified in Arguments.
The point is, that Qt-Creator expects a return value from the command. In this case the command is setsid.