[plt-scheme] what are the exact mzc flags to disable all optimizations?

I'm trying to get mzc to produce stupid code temporarily (I'm
debugging an interpreter).  mzc's being too smart for me.  I'm trying
the following:

    mzc --disable-inline --no-prop ...

One of my test programs I'm feeding through mzc:

    (if (even? 42) 'ok 'not-ok)

but the optimizer is just compiling this down to 'ok.  What magic
flags do I pass to mzc to have it stop optimizing primitive
application?