rm: perl/Makefile.old: No such file or directory
make[1]: [perl/Makefile] Error 1 (ignored)
make[2]: *** No rule to make target `/Applications/Xcode-9.4.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.13.sdk/System/Library/Perl/5.18/darwin-thread-multi-2level/CORE/config.h', needed by `Makefile'.  Stop.
make[1]: *** [all-local] Error 2
make[1]: *** Waiting for unfinished jobs....
make: *** [all] Error 2
subunit/1.4.0: WARN: Build folder is dirty, removing it: /Users/jenkins/w/cci_PR-2957@3/.conan/data/subunit/1.4.0/_/_/build/bff3dd414e80277a7f13333463ceb7ad958570ba
subunit/1.4.0: ERROR: Package 'bff3dd414e80277a7f13333463ceb7ad958570ba' build failed
subunit/1.4.0: WARN: Build folder /Users/jenkins/w/cci_PR-2957@3/.conan/data/subunit/1.4.0/_/_/build/bff3dd414e80277a7f13333463ceb7ad958570ba
ERROR: subunit/1.4.0: Error in build() method, line 98
	autotools.make()
	ConanException: Error 2 while executing make -j8