From here. Often nix-shell invocations have the following issue: 1bash: warning: setlocale: LC_ALL: cannot change locale (en_US.UTF-8) The fix is in two parts: 1# Install glibc 2nix-env -i glibc-locales Then use it in the shellHook as: 1shellHook = '' 2 # Locale 3 export LOCALE_ARCHIVE=${pkgs.glibcLocales}/lib/locale/locale-archive 4''; Or directly as export LOCALE_ARCHIVE="$(nix-env --installed --no-name --out-path --query glibc-locales)/lib/locale/locale-archive"
