Failed to produce item: libUE4Editor-Persona.so

I followed this guide: A new, community-hosted Unreal Engine Wiki - Announcements - Epic Developer Community Forums
last command: make UE4Editor UE4Game UnrealPak CrashReportClient ShaderCompileWorker UnrealLightmass

output:

ERROR: UBT ERROR: Failed to produce item: /home/[…]/UnrealEngine/Engine/Binaries/Linux/libUE4Editor-Persona.somake: ***
[UE4Editor] Fehler 5

Is there already a solution? Are there any log files?

System: Ubuntu 14.04