These are provisional and extracted from https://mail.gnome.org/archives/buildstream-list/2018-October/msg00080.html: - `bst shell --sysroot` semantics now work with a simple sysroot directory instead of our build directory format, which no longer litters the user's disk space (buildstream#539) - A fair amount of breakage in the workspace related commands because Workspace UX reworking (buildstream#695) - The `bst source-bundle` command has been removed and it has become a feature of `bst source-checkout` (buildstream#672) - Default implementation of "strip-commands" has been removed (buildstream#304) - MAKEFLAGS & V environment settings have been removed from the `manual` element (buildstream!916) - Changes in the non-interactive prompt behaviour (buildstream#744) - ~~git plugin does not checkout submodules by default anymore (https://gitlab.com/BuildStream/buildstream/issues/783)~~ This seems is not going to happen anymore - The `git` plugin does not create a local `.git` repository by default anymore. See buildstream!906 and buildstream#487 - `bst track` and `bst fetch` commands are now obsolete. Their functionality is provided by `bst source track` and `bst source fetch` respectively.(See buildstream!1086) For 1.2 incompatibilities see: buildstream#226