9049ab1a3b
Every interactive zsh sources /etc/zshrc (see STARTUP/SHUTDOWN FILES in zshautll(1)) Therefor every interactive zsh process will respect the content of these variables. Using `export` will also lead to child processes inheriting this value. This leads to problems, if other interactive shells are spawned such as bash, because they use an incomptabible history format (without timestamps). There seems to be also cases, where the local HISTSIZE in ~/.zshrc is not sourced but /etc/zshrc, which leads to history truncation in other shells.
*** NixOS *** NixOS is a Linux distribution based on the purely functional package management system Nix. More information can be found at http://nixos.org/nixos and in the manual in doc/manual.