Thanks for your work on this! I believe that you can make your latest version of meson a "hidden" package. You could name it something like "meson-latest", that way only the newer version of sway would use it. And it wouldn't require a rebuild of the world. Perhaps the same is true for wayland. You can look for an example in the gcc.scm file. They have gcc-4.7 as a hidden package. Users cannot install that package, instead they install gcc-toolchain. Thanks, Joshua -- Joshua Branson Sent from Emacs and Gnus