Implementing sound static analyzers for new languages requires significant time and effort. We show that it is possible by partial evaluation to automatically retarget existing abstract interpreters for new languages. Given an existing abstract interpreter for a source language and a definitional interpreter for a new target language, we can derive a correct abstract interpreter for the target language by partially evaluating the abstract interpreter with respect to the definitional interpreter. We demonstrate our method on mini-languages and show that it is possible to mechanize the process with MetaOCaml. Our approach suggests a promising direction to reduce the burden of building new analyzers from scratch.