Assigning pointer to lambda function to pointer to another lambda function

I am trying to assign a pointer to lambda function to pointer to another lambda function. The code will speak for itself:

#include <iostream>

int main(int argc, char *argv[]) {

    auto l1 = []() { std::cout << "Lambda 1!" << std::endl; };
    auto l2 = [] { std::cout << "Lambda 2!" << std::endl; };

    auto l1p = &l1;
    l1p = &l2; // Why can't I do this assignment?
    return 0;
}

Since the return types and argument of both lambda functions are the same, can't I do this assignment?