# TODO better library lookup logic
                  unless libname.start_with?("/") || FFI::Platform.windows?
+                   dirs  = ENV.fetch('DYLD_LIBRARY_PATH',          '').split(':').map { |part| part+'/' }
+                   dirs += ENV.fetch('DYLD_FALLBACK_LIBRARY_PATH', '').split(':').map { |part| part+'/' }
+                   dirs += ['/usr/lib/','/usr/local/lib/','/opt/local/lib/', '/opt/homebrew/lib/']
+                   path = dirs.find do |pth|
-                   path = ['/usr/lib/','/usr/local/lib/','/opt/local/lib/', '/opt/homebrew/lib/'].find do |pth|
                      File.exist?(pth + libname)
                    end