The source for a number of documentation files is present upstream here: https://github.com/perltidy/perltidy but not distributed in the .tar.gz or in Debian. Running lintian... E: perltidy source: source-is-missing [docs/BugLog.html] E: perltidy source: source-is-missing [docs/Tidy.html] E: perltidy source: source-is-missing [docs/perltidy.html] E: perltidy source: source-is-missing [docs/tutorial.html] This should get fixed upstream.