ngraham added a comment.
Thanks, I can verify that the race condition is fixed so parallel building now works! But files in the source repo are still overwritten during the build process if you do an in-source build. If this is not easily resolvable, you could just disallow in-source builds in the CMake file (see Kirigami repo for an example of how). REPOSITORY R98 Breeze for Gtk REVISION DETAIL https://phabricator.kde.org/D17154 To: gepardo, #plasma, jackg, #breeze, #vdg, ngraham Cc: bcooksley, #sysadmin, ngraham, jackg, plasma-devel, GB_2, ragreen, Pitel, ZrenBot, lesliezhai, ali-mohamed, jensreuterberg, abetts, sebas, apol, mart