Hi Christopher, I'm afraid I don't have any useful feedback regarding Evolution, but ... Christopher Howard writes: > Thinking maybe some bogofilter path or option not set during package > build. Tried to confirm this viewing build log from guix-build, but > since I have already built the package once from source, I cannot > figure out how to get guix-build to let me build it again. You can use 'guix build --no-grafts --log-file evolution' to get the build log; or 'guix build --no-grafts --check evolution' to force a rebuild (and check for bit-reproducibility at the same time). HTH, Marius