# disable ssse3 if suppressed explictly or if  CPU / OS X doesn't support it
      if build.without?('ssse3') || MacOS.version <= :snow_leopard || ! Hardware::CPU.ssse3
          args << '-no-ssse3'
      end
      # Qt bug means Haswell based machines (2013) have issues with SSSE3 optimisations

      # => Disable ssse3 for Haswell CPUs for now until fix can be issued
      if Hardware::CPU.family == :haswell
        args << '-no-ssse3'
      end