Building the documentation requires that you download the canonical source tree for both SQLite and the "DocSrc". You can do this as tarballs, but you will probably want to use Fossil. The canonical source code is different from the "snapshot". The snapshots are preprocessed sources that are easier to compile. We make snapshots available so that people who just what SQLite can get to it easily. Building the documentation is more involved. As far as I know, the documentation builds only work on Linux. Pay not attention to the "snapshots". Nor should you mess with any GitHub mirrors. You want to clone these two Fossil repositories: * <https://sqlite.org/src> → the canonical SQLite source code. * <https://sqlite.org/docsrc> → the documentation