Eagle-eyed Noah caught this one.

scarpe.gemspec

@@ -26,7 +26,7 @@ Gem::Specification.new do |spec|
       (f == __FILE__) || f.match(%r{\A(?:(?:test|spec|features)/|\.(?:git|travis|circleci)|appveyor)})
     end
   end
-  spec.bindir = 'bin'
+  spec.bindir = 'exe'
   spec.executables = spec.files.grep(%r{\Aexe/}) { |f| File.basename(f) }
   spec.require_paths = ['lib']