Using BusyBox v1.27.2 on Alpine Linux, the following error appears with busybox tar but not with GNU tar:

$ wget https://github.com/janestreet/jbuilder/releases/download/1.0+beta16/jbuilder-1.0.beta16.tbz
$ tar xvf jbuilder-1.0.beta16.tbz
tar: invalid tar header checksum

Extracting it by hand using bunzip2 doesn't help. The problem seems to be at tar level.

This can be reproduced with the following Dockerfile:

FROM alpine
RUN wget https://github.com/janestreet/jbuilder/releases/download/1.0+beta16/jbuilder-1.0.beta16.tbz
RUN tar xvf jbuilder-1.0.beta16.tbz