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conan install nsync/1.23.0@ --build=nsync --profile=/home/conan/w/BuildSingleReference/33531/abe88d87-f130-4e56-99ae-8837215fe8a1/profile.txt
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Configuration:
[settings]
arch=x86_64
arch_build=x86_64
build_type=Release
compiler=gcc
compiler.libcxx=libstdc++
compiler.version=10
os=Linux
os_build=Linux
[options]
nsync:shared=False
[build_requires]
[env]

nsync/1.23.0: Forced build from source
Installing package: nsync/1.23.0
Requirements
    nsync/1.23.0 from local cache - Cache
Packages
    nsync/1.23.0:82ef5eac51c38971dea2fd342dd55ddf2ddfbbc3 - Build

Installing (downloading, building) binaries...
nsync/1.23.0: Copying sources to build folder
nsync/1.23.0: Building your package in /home/conan/w/BuildSingleReference/.conan/data/nsync/1.23.0/_/_/build/82ef5eac51c38971dea2fd342dd55ddf2ddfbbc3
nsync/1.23.0: 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
nsync/1.23.0: Calling build()
nsync/1.23.0: 
nsync/1.23.0: WARN: Build folder is dirty, removing it: /home/conan/w/BuildSingleReference/.conan/data/nsync/1.23.0/_/_/build/82ef5eac51c38971dea2fd342dd55ddf2ddfbbc3
nsync/1.23.0: ERROR: Package '82ef5eac51c38971dea2fd342dd55ddf2ddfbbc3' build failed
nsync/1.23.0: WARN: Build folder /home/conan/w/BuildSingleReference/.conan/data/nsync/1.23.0/_/_/build/82ef5eac51c38971dea2fd342dd55ddf2ddfbbc3
ERROR: nsync/1.23.0: Error in build() method, line 57
	self._patch_sources()
while calling '_patch_sources', line 52
	tools.replace_in_file(os.path.join(self._source_subfolder, "CMakeLists.txt"),
	NameError: name 'os' is not defined