muparser/all: WARN: Build folder is dirty, removing it: /home/conan/w/cci_PR-4228/.conan/data/muparser/all/_/_/build/fcc9bda6948b7e5cd4eddd99173a9b73f3bfaebb
ERROR: muparser/all: Error in source() method, line 48
	tools.get(**self.conan_data["sources"][self.version])
	KeyError: 'sources'