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@3/.conan/data/leptonica/1.78.0/_/_/build/2497cd67ee5429b0191a2fcb8327d4fa368c6836
leptonica/1.78.0: ERROR: Package '2497cd67ee5429b0191a2fcb8327d4fa368c6836' build failed
leptonica/1.78.0: WARN: Build folder /Users/jenkins/w/cci_PR-3440@3/.conan/data/leptonica/1.78.0/_/_/build/2497cd67ee5429b0191a2fcb8327d4fa368c6836
ERROR: leptonica/1.78.0: Error in build() method, line 119
	if tools.Version(self.settings.os.version) < '10.13':
	ConanException: Invalid version 'None'