error:
       … while evaluating the condition of the assertion '(1 == 1.1)'
         at /pwd/lang/eval-fail-assert-equal-int-float.nix:1:1:
            1| assert 1 == 1.1;
             | ^
            2| throw "unreachable"

       error: an integer with value '1' is not equal to a float with value '1.1'