$ find -type f -name '*.nix' -print0 | xargs -P "$(nproc)" -0 sed -i \ -e 's!with lib.maintainers; \[ *\];![ ];!' \ -e 's!with maintainers; \[ *\];![ ];!'
nix run nixpkgs#silver-searcher -- -G '\.nix$' -0l 'description.*"[Aa]n?' pkgs \ | xargs -0 nix run nixpkgs#gnused -- -i '' -Ee 's/(description.*")[Aa]n? (.)/\1\U\2/'