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conan install proposal/7.0.5@ --build=proposal --profile:host=/Users/jenkins/w/BuildSingleReference@2/12378/ef126946-2acc-461b-8ad6-7c3281920048/profile_host.txt --profile:build=default
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Configuration (profile_host):
[settings]
arch=armv8
build_type=Debug
compiler=apple-clang
compiler.libcxx=libc++
compiler.version=12.0
os=Macos
[options]
proposal:shared=True
[build_requires]
[env]

Configuration (profile_build):
[settings]
arch=x86_64
arch_build=x86_64
build_type=Release
compiler=apple-clang
compiler.libcxx=libc++
compiler.version=12.0
os=Macos
os_build=Macos
[options]
[build_requires]
[env]

proposal/7.0.5: Forced build from source
Installing package: proposal/7.0.5
Requirements
    boost/1.75.0 from 'conan-center' - Cache
    bzip2/1.0.8 from 'conan-center' - Cache
    cubicinterpolation/0.1.4 from 'conan-center' - Cache
    eigen/3.3.9 from 'conan-center' - Cache
    fmt/7.1.3 from 'conan-center' - Cache
    libbacktrace/cci.20210118 from 'conan-center' - Cache
    libiconv/1.16 from 'conan-center' - Cache
    nlohmann_json/3.9.1 from 'conan-center' - Cache
    proposal/7.0.5 from local cache - Cache
    spdlog/1.8.2 from 'conan-center' - Cache
    zlib/1.2.11 from 'conan-center' - Cache
Packages
    boost/1.75.0:8fa44b443afcbe4783b144462eafd9e1903b727f - Missing
    bzip2/1.0.8:1eebc1ca972faabad362af04f3107014f151fa5d - Missing
    cubicinterpolation/0.1.4:84093771c1de231ccfec0ab7a556657cc5066596 - Missing
    eigen/3.3.9:5ab84d6acfe1f23c4fae0ab88f26e3a396351ac9 - Download
    fmt/7.1.3:929c83d5aae0ebf9f67f0a2eb7bc58aed10c6910 - Missing
    libbacktrace/cci.20210118:baf78352c82543f997ec32332829b6fa30714eaa - Missing
    libiconv/1.16:baf78352c82543f997ec32332829b6fa30714eaa - Download
    nlohmann_json/3.9.1:5ab84d6acfe1f23c4fae0ab88f26e3a396351ac9 - Download
    proposal/7.0.5:2312b1cca054dc8d85fc93f5b66dd4bef245a65a - Build
    spdlog/1.8.2:7798a1f548d5c040796aaab4063e76fafd43b5f6 - Missing
    zlib/1.2.11:baf78352c82543f997ec32332829b6fa30714eaa - Download

Cross-build from 'Macos:x86_64' to 'Macos:armv8'
Installing (downloading, building) binaries...

ERROR: Missing binary: boost/1.75.0:8fa44b443afcbe4783b144462eafd9e1903b727f
ERROR: Missing binary: bzip2/1.0.8:1eebc1ca972faabad362af04f3107014f151fa5d
ERROR: Missing binary: cubicinterpolation/0.1.4:84093771c1de231ccfec0ab7a556657cc5066596
ERROR: Missing binary: fmt/7.1.3:929c83d5aae0ebf9f67f0a2eb7bc58aed10c6910
ERROR: Missing binary: libbacktrace/cci.20210118:baf78352c82543f997ec32332829b6fa30714eaa
ERROR: Missing binary: spdlog/1.8.2:7798a1f548d5c040796aaab4063e76fafd43b5f6
bzip2/1.0.8: WARN: Can't find a 'bzip2/1.0.8' package for the specified settings, options and dependencies:
- Settings: arch=armv8, build_type=Debug, compiler=apple-clang, compiler.version=12.0, os=Macos
- Options: build_executable=True, fPIC=True, shared=False
- Dependencies: 
- Requirements: 
- Package ID: 1eebc1ca972faabad362af04f3107014f151fa5d

ERROR: Missing prebuilt package for 'boost/1.75.0', 'bzip2/1.0.8', 'cubicinterpolation/0.1.4', 'fmt/7.1.3', 'libbacktrace/cci.20210118', 'spdlog/1.8.2'
Try to build from sources with '--build=missing'
Use 'conan search <reference> --table table.html'
Or read 'http://docs.conan.io/en/latest/faq/troubleshooting.html#error-missing-prebuilt-package'