# Check for pre-existing PDL module in @INC
  eval { require PDL::Lite; PDL::Lite->import(); };
  unless($@)
  {
     # uh-oh! we have a pre-existing PDL in path
     warn( "\n  ****** WARNING ******\n"
        . "  PDL version $PDL::Version::VERSION was detected in your \@INC\n"
        . "  PDL may not build/test correctly with another PDL in \@INC!\n" );

     my $go_on = prompt("\nDo you still wish to continue?", 'y');
     die "OK, stopping build\n" unless $go_on =~ /^[yY]/;
  }