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conan install zbar/0.10@ --build=zbar --profile=/home/conan/w/BuildSingleReference/66545/0fd672a7-43b4-45cb-b749-0b854bdb5f91/profile.txt
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Configuration:
[settings]
arch=x86_64
build_type=Debug
compiler=gcc
compiler.libcxx=libstdc++
compiler.version=8
os=Linux
[options]
zbar:shared=False
[build_requires]
[env]

zbar/0.10: Forced build from source
Installing package: zbar/0.10
Requirements
    zbar/0.10 from local cache - Cache
Packages
    zbar/0.10:dacd1076f014f9f8a2f88fa16a41cdad67a62a84 - Build
Build requirements
    gnu-config/cci.20210814 from 'conan-center' - Cache
Build requirements packages
    gnu-config/cci.20210814:5ab84d6acfe1f23c4fae0ab88f26e3a396351ac9 - Cache

Installing (downloading, building) binaries...
gnu-config/cci.20210814: Already installed!
gnu-config/cci.20210814: Appending PATH environment variable: /home/conan/w/BuildSingleReference/.conan/data/gnu-config/cci.20210814/_/_/package/5ab84d6acfe1f23c4fae0ab88f26e3a396351ac9/bin
[HOOK - conan-center.py] post_package_info(): [CMAKE FILE NOT IN BUILD FOLDERS (KB-H019)] OK
[HOOK - conan-center.py] post_package_info(): [LIBRARY DOES NOT EXIST (KB-H054)] OK
zbar/0.10: Applying build-requirement: gnu-config/cci.20210814
[HOOK - conan-center.py] pre_source(): [IMMUTABLE SOURCES (KB-H010)] OK
zbar/0.10: Configuring sources in /home/conan/w/BuildSingleReference/.conan/data/zbar/0.10/_/_/source
Waiting 5 seconds to retry...
gnu-config/cci.20210814: WARN: Lib folder doesn't exist, can't collect libraries: /home/conan/w/BuildSingleReference/.conan/data/gnu-config/cci.20210814/_/_/package/5ab84d6acfe1f23c4fae0ab88f26e3a396351ac9/lib
zbar/0.10: WARN: Build folder is dirty, removing it: /home/conan/w/BuildSingleReference/.conan/data/zbar/0.10/_/_/build/dacd1076f014f9f8a2f88fa16a41cdad67a62a84
zbar/0.10: WARN: Trying to remove corrupted source folder
zbar/0.10: WARN: This can take a while for big packages
ERROR: Error downloading file https://sourceforge.net/projects/zbar/files/zbar/0.10/zbar-0.10.tar.gz: 'HTTPSConnectionPool(host='sourceforge.net', port=443): Max retries exceeded with url: /projects/zbar/files/zbar/0.10/zbar-0.10.tar.gz (Caused by ResponseError('too many 504 error responses'))'
ERROR: zbar/0.10: Error in source() method, line 95
	destination=self._source_subfolder, strip_root=True)
	ConanException: Error downloading file https://sourceforge.net/projects/zbar/files/zbar/0.10/zbar-0.10.tar.gz: 'HTTPSConnectionPool(host='sourceforge.net', port=443): Max retries exceeded with url: /projects/zbar/files/zbar/0.10/zbar-0.10.tar.gz/ (Caused by ResponseError('too many 504 error responses'))'