--- a/rakelib/setup.rake	Fri Aug 11 09:59:28 2017 +0200
+++ b/rakelib/setup.rake	Fri Aug 11 21:48:13 2017 +0100
@@ -37,7 +37,7 @@
         TOOLCHAIN='mingw32'
       end
     else
-      raise new Exception('Unsupported operating system')
+      raise Exception.new('Unsupported operating system')
     end
   end
 end
@@ -96,7 +96,7 @@
     MAKE='mingwmake.bat'
     ENV['PATH'] = "#{ENV['PATH']};#{ENV['MINGW_DIR']}\\bin"
 
-  when (TOOLCHAIN == 'mingw' or TOOLCHAIN == 'mingw32')
+  when 'mingw32'
     if File.exist? 'C:\mingw\bin'
       ENV['MINGW_DIR'] ='C:\MINGW'
       ENV['USEMINGW_ARG'] = '-DUSEMINGW32'
@@ -117,7 +117,7 @@
     ENV['PATH'] = "#{ENV['PATH']};#{ENV['MINGW_DIR']}\\bin"
 
   else
-    raise new Exception("Unsupported toolchain: #{TOOLCHAIN}")
+    raise Exception.new("Unsupported toolchain: #{TOOLCHAIN}")
 end
 
 task :setup => %i(setup:pre