muparser/all: WARN: Build folder is dirty, removing it: /home/conan/w/cci_PR-4228/.conan/data/muparser/all/_/_/build/4385e18b024237c4c0c095ad5eb42128ee311944
ERROR: muparser/all: Error in source() method, line 48
	tools.get(**self.conan_data["sources"][self.version])
	KeyError: 'sources'