old_contents: from conans import ConanFile, CMake
  
  class CausalDynamicalTriangulations(ConanFile):
      settings = "os", "compiler", "build_type", "arch"
      requires = "boost/1.68.0@conan/stable", "catch2/2.4.0@bincrafters/stable", "TBB/2018_U6@conan/stable",\
                 "eigen/3.3.5@conan/stable", "docopt/0.6.2@conan/stable",\
                 "date/2.4.1@bincrafters/stable", "gsl_microsoft/1.0.0@bincrafters/stable"
      generators = "cmake"
      default_options = "boost:without_thread=False"
      # default_options = "Boost:header_only=True"
  
      def build(self):
          cmake = CMake(self)
          cmake.verbose = True
          cmake.definitions["CMAKE_BUILD_TYPE"] = "RelWithDebInfo"
          cmake.configure(args=["CMAKE_EXPORT_COMPILE_COMMANDS=ON"])
          cmake.build()
  
      def build_requirements(self):
          self.build_requires("cmake_installer/3.11.3@conan/stable")
new_contents: from conans import ConanFile, CMake
  
  class CausalDynamicalTriangulations(ConanFile):
      settings = "os", "compiler", "build_type", "arch"
      requires = "boost/1.68.0@conan/stable", "catch2/2.4.0@bincrafters/stable", "TBB/2018_U5@conan/stable",\
                 "eigen/3.3.5@conan/stable", "docopt/0.6.2@conan/stable",\
                 "date/2.4.1@bincrafters/stable", "gsl_microsoft/1.0.0@bincrafters/stable"
      generators = "cmake"
      default_options = "boost:without_thread=False"
      # default_options = "Boost:header_only=True"
  
      def build(self):
          cmake = CMake(self)
          cmake.verbose = True
          cmake.definitions["CMAKE_BUILD_TYPE"] = "RelWithDebInfo"
          cmake.configure(args=["CMAKE_EXPORT_COMPILE_COMMANDS=ON"])
          cmake.build()
  
      def build_requirements(self):
          self.build_requires("cmake_installer/3.11.3@conan/stable")
subject: Revert TBB/2018_U6@conan/stable