muparser/all: WARN: Build folder is dirty, removing it: /home/conan/w/cci_PR-4228/.conan/data/muparser/all/_/_/build/038f8796e196b3dba76fcc5fd4ef5d3d9c6866ec
ERROR: muparser/all: Error in source() method, line 48
	tools.get(**self.conan_data["sources"][self.version])
	KeyError: 'sources'