{ lib, stdenv, writeText, runtimeShell }: let script = writeText "script" '' #!${runtimeShell} if command -v sendmail > /dev/null 2>&1 && [ "$(command -v sendmail)" != "{{MYPATH}}" ]; then exec sendmail "$@" elif [ -x /run/wrappers/bin/sendmail ]; then exec /run/wrappers/bin/sendmail "$@" elif [ -x /run/current-system/sw/bin/sendmail ]; then exec /run/current-system/sw/bin/sendmail "$@" else echo "Unable to find system sendmail." >&2 exit 1 fi ''; in stdenv.mkDerivation { pname = "system-sendmail"; version = "1.0"; src = script; phases = [ "buildPhase" ]; buildPhase = '' mkdir -p $out/bin < $src sed "s#{{MYPATH}}#$out/bin/sendmail#" > $out/bin/sendmail chmod +x $out/bin/sendmail ''; meta = with lib; { description = '' A sendmail wrapper that calls the system sendmail. Do not install as system-wide sendmail! ''; platforms = platforms.unix; maintainers = with maintainers; [ ekleog ]; }; }