You are right guys... my bad. But shouldn't lib[64]jpeg62 provide some platform-agnostic token so it can be Requires:'d in a portable way? How about "jpeg62"? Right now I have the following in racket.spec: %ifarch x86_64 BuildRequires: lib64jpeg62 %else BuildRequires: libjpeg62 %endif Looks pretty ugly, right? Mitya