buildah: prefer to build wrapper locally

Same as 9c9828260989fa4f3d1211a48f1db1e4d65dbf18

pkgs/development/tools/buildah/wrapper.nix

···
 let
   buildah = buildah-unwrapped;
 
+  preferLocalBuild = true;
+
   binPath = lib.makeBinPath ([
     runc
     crun