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conan install libnet/1.2@ --build=libnet --profile=/home/conan/w/BuildSingleReference/18812/7dd4c7d6-5e58-4bdb-a2cc-297d39d54dc9/profile.txt
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Configuration:
[settings]
arch=x86_64
arch_build=x86_64
build_type=Debug
compiler=gcc
compiler.libcxx=libstdc++
compiler.version=4.9
os=Linux
os_build=Linux
[options]
libnet:shared=False
[build_requires]
[env]

libnet/1.2: Forced build from source
Installing package: libnet/1.2
Requirements
    libnet/1.2 from local cache - Cache
Packages
    libnet/1.2:3b345617ce2bd705ca33e4a8969fc7eb031ea30a - Build

Installing (downloading, building) binaries...
[HOOK - conan-center.py] pre_source(): [IMMUTABLE SOURCES (KB-H010)] OK
libnet/1.2: Configuring sources in /home/conan/w/BuildSingleReference/.conan/data/libnet/1.2/_/_/source

libnet/1.2: WARN: Build folder is dirty, removing it: /home/conan/w/BuildSingleReference/.conan/data/libnet/1.2/_/_/build/3b345617ce2bd705ca33e4a8969fc7eb031ea30a
libnet/1.2: WARN: Trying to remove corrupted source folder
libnet/1.2: WARN: This can take a while for big packages
[HOOK - conan-center.py] post_source(): ERROR: [LIBCXX MANAGEMENT (KB-H011)] Can't detect C++ source files but recipe does not remove 'self.settings.compiler.libcxx' (https://github.com/conan-io/conan-center-index/blob/master/docs/error_knowledge_base.md#KB-H011) 
[HOOK - conan-center.py] post_source(): ERROR: [CPPSTD MANAGEMENT (KB-H022)] Can't detect C++ source files but recipe does not remove 'self.settings.compiler.cppstd' (https://github.com/conan-io/conan-center-index/blob/master/docs/error_knowledge_base.md#KB-H022) 
ERROR: [HOOK - conan-center.py] post_source(): Some checks failed running the hook, check the output