Unison is a file-synchronization tool for Unix and Windows. It allows two replicas of a collection of files and directories to be stored on different hosts (or different disks on the same host), modified separately, and then brought up to date by propagating the changes in each replica to the other. Unlike simple mirroring or backup utilities, Unison can deal with updates to both replicas of a distributed directory structure. Updates that do not conflict are propagated automatically. Conflicting updates are detected and displayed. Unison allows you to either build a text-only binary or a binary that will use a graphical user interface. By default this slackbuild will, similar to Slackware's own emacs package, build both a text-only and a gui binary. To do this (which is the default): "FLAVOUR='gtk2 text' ./unison.SlackBuild" or just "./unison.SlackBuild" To only build a text only binary, do this: "FLAVOUR=text ./unison.SlackBuild" To only build a gui only binary, do this: "FLAVOUR=gtk2 ./unison.SlackBuild" hevea is an optional dependency which allows building the HTML documentation. Otherwise only a version as PDF will be built.