You could always just bootstrap a nuclear program in Ukraine instead.
They gave up their nukes in exchange for protection from Russia and the US. Both countries have failed to keep up their end of the bargain, so it's sensible for Ukraine to get back what they gave up.
Great idea. Uncontrollable wars? Rising extremism all over the world? New generation of politicians who never experienced real diplomacy? Moralism, division, hatred... of course... the only things to save us all: the nukes. Let's just get it over with!
A somewhat more-amusing proposal I've seen: Ukraine declares "war" against a NATO nation (e.g. Poland) and then immediately surrenders. Then it starts negotiations to secede while keeping NATO membership without a gap.
They gave up their nukes in exchange for protection from Russia and the US. Both countries have failed to keep up their end of the bargain, so it's sensible for Ukraine to get back what they gave up.