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conan install libssh2/1.9.0@ --build=libssh2 --profile=C:\J\w\BuildSingleReference/31065/c10fbd1f-6fc9-447a-aa06-63688d886d0a/profile.txt
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Configuration:
[settings]
arch=x86_64
arch_build=x86_64
build_type=Debug
compiler=Visual Studio
compiler.runtime=MTd
compiler.version=16
os=Windows
os_build=Windows
[options]
libssh2:shared=True
[build_requires]
[env]

libssh2/1.9.0: Forced build from source
Installing package: libssh2/1.9.0
Requirements
    libssh2/1.9.0 from local cache - Cache
    openssl/1.1.1l from 'conan-center' - Cache
    zlib/1.2.11 from 'conan-center' - Cache
Packages
    libssh2/1.9.0:0d04abbc7f90c2a9eed8ea0aeb0601bf38b0bfe6 - Build
    openssl/1.1.1l:b2b69efcc79a149e0bc765fb12ba0278d52fc260 - Download
    zlib/1.2.11:b2b69efcc79a149e0bc765fb12ba0278d52fc260 - Missing

Installing (downloading, building) binaries...

ERROR: Missing binary: zlib/1.2.11:b2b69efcc79a149e0bc765fb12ba0278d52fc260
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=Debug, compiler=Visual Studio, compiler.runtime=MTd, compiler.version=16, os=Windows
- Options: minizip=deprecated, shared=False
- Dependencies: 
- Requirements: 
- Package ID: b2b69efcc79a149e0bc765fb12ba0278d52fc260

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'