The SDK eve carries INSTALL_RPATH @loader_path/../lib for the bin/+lib/
SDK layout, but 'eve package' places the copied lib/ tree at <out>/lib
next to the eve binary, so dyld failed with '@rpath/libz.1.dylib' not
loaded. Add @loader_path/lib to the RPATH and make bootstrapBundledVulkan
check exeDir/lib (package layout) in addition to ../lib (SDK) and
../Frameworks (.app bundle).