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conan install yaml-cpp/0.6.3@ --build=yaml-cpp --profile=/home/conan/w/BuildSingleReference/23127/63257e58-eb59-4eec-9d7f-ab5104413e6a/profile.txt
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Configuration:
[settings]
arch=x86_64
arch_build=x86_64
build_type=Release
compiler=gcc
compiler.libcxx=libstdc++11
compiler.version=9
os=Linux
os_build=Linux
[options]
yaml-cpp:shared=False
[build_requires]
[env]

yaml-cpp/0.6.3: Forced build from source
Installing package: yaml-cpp/0.6.3
Requirements
    yaml-cpp/0.6.3 from local cache - Cache
Packages
    yaml-cpp/0.6.3:b911f48570f9bb2902d9e83b2b9ebf9d376c8c56 - Build

Installing (downloading, building) binaries...
yaml-cpp/0.6.3: Copying sources to build folder
yaml-cpp/0.6.3: Building your package in /home/conan/w/BuildSingleReference/.conan/data/yaml-cpp/0.6.3/_/_/build/b911f48570f9bb2902d9e83b2b9ebf9d376c8c56
yaml-cpp/0.6.3: Generator cmake created conanbuildinfo.cmake
[HOOK - conan-center.py] pre_build(): [FPIC MANAGEMENT (KB-H007)] OK. 'fPIC' option found and apparently well managed
[HOOK - conan-center.py] pre_build(): [FPIC MANAGEMENT (KB-H007)] OK
yaml-cpp/0.6.3: Calling build()
yaml-cpp/0.6.3: 
yaml-cpp/0.6.3: WARN: Build folder is dirty, removing it: /home/conan/w/BuildSingleReference/.conan/data/yaml-cpp/0.6.3/_/_/build/b911f48570f9bb2902d9e83b2b9ebf9d376c8c56
yaml-cpp/0.6.3: ERROR: Package 'b911f48570f9bb2902d9e83b2b9ebf9d376c8c56' build failed
yaml-cpp/0.6.3: WARN: Build folder /home/conan/w/BuildSingleReference/.conan/data/yaml-cpp/0.6.3/_/_/build/b911f48570f9bb2902d9e83b2b9ebf9d376c8c56
ERROR: yaml-cpp/0.6.3: Error in build() method, line 57
	self._patch_sources()
while calling '_patch_sources', line 39
	for patch in self.conan_data["patches"][self.version]:
	KeyError: 'patches'