muparser/all: WARN: Build folder is dirty, removing it: /home/conan/w/cci_PR-4228/.conan/data/muparser/all/_/_/build/0af8d75efe38bba3cbf8f16eed4218fe0d5f9605
ERROR: muparser/all: Error in source() method, line 48
	tools.get(**self.conan_data["sources"][self.version])
	KeyError: 'sources'