Error building RR from source

[SahilCrazy]

Hi,

I wanted to build RR from source for the Xperia X but while building I am stuck at a ninja error I don't know how to get rid off :

Starting build with ninja
ninja: Entering directory `.'
ninja: error: '/.txt', needed by '/root/RR/out/target/common/obj/PACKAGING/checkpublicapi-cm-last-timestamp', missing and no known rule to make it
make: *** [build/core/ninja.mk:152: ninja_wrapper] Error 1

So does anyone have an Idea what is causing the '/.txt' file to be missing and that theres no known rule to make it?

Greetings.