Unreal Engine Source - Cross Compile Linux libpthread.so not found

I have downloaded Unreal Engine 4.26.2 from source and build it for Windows.
Now im trying to cross compile to linux using this [link text][1]

Now I get a error message saying “cannot open /lib64/libpthread.so.0: no such file or directory”.

When I look in the UnrealToolChain, I can find the file in the path shown in the picture below.
Does anyone know why I get the message?