I have sys-apps/bat-0.20.0 and dev-util/git-delta-0.13.0 both installed git diff [bat warning]: Unknown theme 'Monokai Extended', using default. thread 'main' panicked at 'something is very wrong if the default theme is missing', /var/tmp/portage/dev-util/git-delta-0.13.0/work/cargo_home/gentoo/bat-0.21.0/src/assets.rs:205:22 note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace see https://github.com/dandavison/delta/issues/1075 and https://bugs.archlinux.org/task/74765 TL;DR >dev-util/git-delta-0.12.1 is incompatible with <=sys-apps/bat-0.20.0 <=dev-util/git-delta-0.12.1 is incompatible with >sys-apps/bat-0.20.0