******************************************************************************** conan install libnl/3.2.25@ --profile=/home/conan/w/BuildSingleReference/1356/80dba9c9-c89e-4370-9f03-94a84db5b40a/profile.txt --build=libnl ******************************************************************************** Configuration: [settings] arch=x86_64 arch_build=x86_64 build_type=Release compiler=clang compiler.libcxx=libstdc++ compiler.version=10 os=Linux os_build=Linux [options] libnl:shared=True [build_requires] [env] libnl/3.2.25: Forced build from source Installing package: libnl/3.2.25 Requirements libnl/3.2.25 from 'conan-upstream' - Cache Packages libnl/3.2.25:da82c45faf95f16de2c6a6f3b0d205907ceadfee - Build Build requirements bison/3.5.3 from 'conan-center' - Cache flex/2.6.4 from 'conan-center' - Cache m4/1.4.18 from 'conan-center' - Cache Build requirements packages bison/3.5.3:50670b0880ed3992f0ff9033d5468f250b834748 - Missing flex/2.6.4:50670b0880ed3992f0ff9033d5468f250b834748 - Missing m4/1.4.18:ff80e7403f600537b027c926b842e2b4ae454c18 - Download Installing (downloading, building) binaries... ERROR: Missing binary: bison/3.5.3:50670b0880ed3992f0ff9033d5468f250b834748 ERROR: Missing binary: flex/2.6.4:50670b0880ed3992f0ff9033d5468f250b834748 bison/3.5.3: WARN: Can't find a 'bison/3.5.3' package for the specified settings, options and dependencies: - Settings: arch=x86_64, build_type=Release, compiler=clang, compiler.version=10, os=Linux - Options: fPIC=True - Dependencies: m4/1.4.18 - Requirements: m4/1.Y.Z - Package ID: 50670b0880ed3992f0ff9033d5468f250b834748 ERROR: Missing prebuilt package for 'bison/3.5.3', 'flex/2.6.4' Try to build from sources with '--build=bison --build=flex' Use 'conan search --table table.html' Or read 'http://docs.conan.io/en/latest/faq/troubleshooting.html#error-missing-prebuilt-package'