Customized glibcLocales package providing the LOCALE_ARCHIVE_* environment variable. This option only applies to the Linux platform. When Home Manager is configured with NixOS, the default value will be set to i18n.glibcLocales from the system configuration.

pkgs.glibcLocales

pkgs.glibcLocales.override { allLocales = false; locales = [ "en_US.UTF-8/UTF-8" ]; }