stapxx-master/tapset/luajit.sxx: line 7: libluajit is not found, assuming it is statically linked.

[yxd05]

Hi
First time trying stapxx tools, but get this error:
/stapxx-master# ./samples/lj-lua-stacks.sxx --arg time=5 --skip-badvars -x 9329 > tmp.bt
/home/work/tmp/systemtap/stapxx-master/tapset/luajit.sxx: line 7: libluajit is not found, assuming it is statically linked.

kernel:3.10.0-862.el7.x86_64

export STAP_FIPS_OVERRIDE=1 && stap -v -e 'probe vfs.read {printf("read performed\n"); exit()}'
Pass 1: parsed user script and 475 library scripts using 267264virt/68836res/3476shr/65436data kb, in 640usr/30sys/677real ms.
Pass 2: analyzed script: 1 probe, 1 function, 7 embeds, 0 globals using 426220virt/222980res/4776shr/224392data kb, in 1930usr/400sys/3115real ms.
Pass 3: using cached /root/.systemtap/cache/6a/stap_6a11cd2a90a17bfa12fe2f0e331fabb2_2800.c
Pass 4: using cached /root/.systemtap/cache/6a/stap_6a11cd2a90a17bfa12fe2f0e331fabb2_2800.ko
Pass 5: starting run.
read performed
Pass 5: run completed in 10usr/30sys/382real ms.

Any help much appreciated!
Thanks
Richard