sv_pkg9.sv

package my_pkg1;
  int unsigned a = 1;
endpackage : my_pkg1

module top();
  // Not importing my_pkg1 here
  int unsigned a = 2;
  
  initial begin
    $display ("a=%0d", a);
    $display ("my_pkg1::a=%0d", my_pkg1::a);
  end
endmodule : top

//Output:
// a=2
// my_pkg1::a=1