@@ -6309,6 +6309,21 @@ subdirectory of your user data directory (see [Templates]).
63096309
63106310[Lua]: https://www.lua.org
63116311
6312+# Reproducible builds
6313+
6314+Some of the document formats pandoc targets (such as EPUB,
6315+docx, and ODT) include build timestamps in the generated document.
6316+That means that the files generated on successive builds will
6317+differ, even if the source does not. To avoid this, set the
6318+`SOURCE_DATE_EPOCH` environment variable, and the timestamp will
6319+be taken from it instead of the current time.
6320+`SOURCE_DATE_EPOCH` should contain an integer unix timestamp
6321+(specifying the number of second since midnight UTC January 1, 1970).
6322+
6323+Some document formats also include a unique identifier. For
6324+EPUB, this can be set explicitly by setting the `identifier`
6325+metadata field (see [EPUB Metadata], above).
6326+
63126327# A note on security
63136328
63146329If you use pandoc to convert user-contributed content in a web