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conan install libssh2/1.10.0@ --build=libssh2 --profile=/Users/jenkins/w/BuildSingleReference@6/31066/91a05134-9a71-40b7-9b0c-f357221ea43e/profile.txt
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Configuration:
[settings]
arch=x86_64
arch_build=x86_64
build_type=Release
compiler=apple-clang
compiler.libcxx=libc++
compiler.version=10.0
os=Macos
os_build=Macos
[options]
libssh2:shared=False
[build_requires]
[env]

libssh2/1.10.0: Forced build from source
Installing package: libssh2/1.10.0
Requirements
    libssh2/1.10.0 from local cache - Cache
    openssl/1.1.1l from 'conan-center' - Cache
    zlib/1.2.11 from 'conan-center' - Cache
Packages
    libssh2/1.10.0:e14536dbd064a8d3d9abac335ab96040cd12df2f - Build
    openssl/1.1.1l:534dcc368c999e07e81f146b3466b8f656ef1f55 - Download
    zlib/1.2.11:534dcc368c999e07e81f146b3466b8f656ef1f55 - Missing

Installing (downloading, building) binaries...

ERROR: Missing binary: zlib/1.2.11:534dcc368c999e07e81f146b3466b8f656ef1f55
zlib/1.2.11: WARN: Can't find a 'zlib/1.2.11' package for the specified settings, options and dependencies:
- Settings: arch=x86_64, build_type=Release, compiler=apple-clang, compiler.version=10.0, os=Macos
- Options: fPIC=True, minizip=deprecated, shared=False
- Dependencies: 
- Requirements: 
- Package ID: 534dcc368c999e07e81f146b3466b8f656ef1f55

ERROR: Missing prebuilt package for 'zlib/1.2.11'
Try to build from sources with '--build=zlib'
Use 'conan search <reference> --table table.html'
Or read 'http://docs.conan.io/en/latest/faq/troubleshooting.html#error-missing-prebuilt-package'