Shstats depends on morbig >= 0.10.0
A simple make should work.
On a corpus of debian packages:
find corpus -iregex '.*/\(pre\|post\)\(inst\|rm\)' \
| bin/shstats --specifications share/specifications --report-path report
should do the trick. You can then open report/index.org in any editor
(although Emacs is recommended as it has a nice support for Org
files).