WARN: libtiff/4.1.0: requirement libwebp/1.1.0 overridden by leptonica/1.78.0 to libwebp/1.0.3 
leptonica/1.78.0: WARN: Build folder is dirty, removing it: /Users/jenkins/w/cci_PR-3440@2/.conan/data/leptonica/1.78.0/_/_/build/ddd60d84bcf8384e7b2355d958c14618cc708e17
leptonica/1.78.0: ERROR: Package 'ddd60d84bcf8384e7b2355d958c14618cc708e17' build failed
leptonica/1.78.0: WARN: Build folder /Users/jenkins/w/cci_PR-3440@2/.conan/data/leptonica/1.78.0/_/_/build/ddd60d84bcf8384e7b2355d958c14618cc708e17
ERROR: leptonica/1.78.0: Error in build() method, line 119
	if tools.Version(self.settings.os.version) < '10.13':
	ConanException: Invalid version 'None'