Prepend Kernel module function globally

I want to prepend Kernel.rand like this:

# I try something likemod = Module.new do  def rand(*args)    p "do something"    super(*args)  endendKernel.prepend(mod)

# And I expect this behaviourKernel.rand            #> prints "do something" and returns random numberrand                   #> prints "do something" and returns random numberObject.new.send(:rand) #> prints "do something" and returns random number 

Unfortunately, the code above does not work as I want to. Prepending Kernel.singleton_class does not work too

It's not required to use prepend feature, any suggestiion that will help to achieve the desired behaviour is welcome