> /home/code/build/qbs/bin/qbs --jobs 8 build profile:qtc_Desktop debug
ERROR: No profile given and no default profile set.
Either set the configuration value 'defaultProfile' to a valid profile name
or specify the profile with the command line parameter 'profile:name'.
The following profiles are available:
qtc_Desktop
Restoring build graph from disk
ERROR: Execution canceled due to user request.

I find this message confusing:

• There is a profile set, it is even listed by the command!
• Why does it restore the build graph from disk if it does not know what to build?
• There was no user request to cancel the build.

Running .../qbs build --jobs 8 works fine.