# File lib/bundler/rubygems_integration.rb, line 344
    def replace_bin_path(specs)
      gem_class = (class << Gem; self; end)
      redefine_method(gem_class, :bin_path) do |name, *args|
        exec_name = args.first

        return ENV["BUNDLE_BIN_PATH"] if exec_name == "bundle"

        spec = nil

        if exec_name
          spec = specs.find {|s| s.executables.include?(exec_name) }
          raise(Gem::Exception, "can't find executable #{exec_name}") unless spec
          unless spec.name == name
            warn "Bundler is using a binstub that was created for a different gem.\n" \
              "This is deprecated, in future versions you may need to `bundle binstub #{name}` " \
              "to work around a system/bundle conflict."
          end
        else
          spec = specs.find {|s| s.name == name }
          raise Gem::Exception, "no default executable for #{spec.full_name}" unless exec_name = spec.default_executable
        end

        gem_bin = File.join(spec.full_gem_path, spec.bindir, exec_name)
        gem_from_path_bin = File.join(File.dirname(spec.loaded_from), spec.bindir, exec_name)
        File.exist?(gem_bin) ? gem_bin : gem_from_path_bin
      end
    end