muparser/all: WARN: Build folder is dirty, removing it: /home/conan/w/cci_PR-4228/.conan/data/muparser/all/_/_/build/b759e10106fc0b4923414b05bb78eba0bbc8b30b
ERROR: muparser/all: Error in source() method, line 48
	tools.get(**self.conan_data["sources"][self.version])
	KeyError: 'sources'