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conan install mosquitto/1.6.12@ --profile=/home/conan/w/BuildSingleReference/3376/cdbbaf26-0ada-46e9-b4d4-b1d40aba93f3/profile.txt --build=mosquitto
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Configuration:
[settings]
arch=x86_64
arch_build=x86_64
build_type=Debug
compiler=clang
compiler.libcxx=libstdc++
compiler.version=10
os=Linux
os_build=Linux
[options]
mosquitto:shared=False
[build_requires]
[env]

mosquitto/1.6.12: Forced build from source
Installing package: mosquitto/1.6.12
Requirements
    libwebsockets/4.1.6 from 'conan-center' - Cache
    mosquitto/1.6.12 from local cache - Cache
    openssl/1.1.1i from 'conan-center' - Cache
Packages
    libwebsockets/4.1.6:3fd75f671b324a6eb8f40d39eaada178b0fc03a8 - Missing
    mosquitto/1.6.12:dd45ff0e2a052b19b6b5e76e04caed782c50b47c - Build
    openssl/1.1.1i:72c3493baf37f6fd0e9e64ab36754d5a2f6479a9 - Download

Installing (downloading, building) binaries...

ERROR: Missing binary: libwebsockets/4.1.6:3fd75f671b324a6eb8f40d39eaada178b0fc03a8
libwebsockets/4.1.6: WARN: Can't find a 'libwebsockets/4.1.6' package for the specified settings, options and dependencies:
- Settings: arch=x86_64, build_type=Debug, compiler=clang, compiler.version=10, os=Linux
- Options: avoid_sigpipe_ign=False, disable_logs=False, enable_access_log=False, enable_acme=False, enable_builtin_getifaddrs=True, enable_builtin_sha1=True, enable_cgi=False, enable_custom_headers=True, enable_daemonize=False, enable_deprecated_lws_dll=False, enable_detailed_latency=False, enable_dir=False, enable_diskcache=False, enable_extensions=False, enable_external_http_proxying=True, enable_external_poll=False, enable_fallback_gethostbyname=False, enable_file_ops=True, enable_fts=False, enable_gcov=False, enable_gencrypto=False, enable_generic_sessions=False, enable_http2=True, enable_http_basic_auth=True, enable_http_brotli=False, enable_http_proxy=False, enable_http_stream_compression=False, enable_http_uncommon_headers=True, enable_ipv6=False, enable_jose=False, enable_lejp=True, enable_lejp_conf=False, enable_lws_dsh=False, enable_lwsac=True, enable_lwsws=False, enable_network=True, enable_peer_limits=False, enable_plugins=False, enable_ranges=False, enable_secure_streams=False, enable_secure_streams_proxy_api=False, enable_secure_streams_static_policy_only=False, enable_secure_streams_sys_auth_api_amazon_com=False, enable_selftests=False, enable_sequencer=True, enable_server_status=False, enable_socks5=False, enable_spawn=False, enable_stats=False, enable_struct_json=False, enable_struct_sqlite3=False, enable_sys_async_dns=False, enable_sys_dhcp_client=False, enable_sys_ntpclient=False, enable_threadpool=False, enable_udp=True, enable_unix_sock=True, enable_zip_fops=False, fPIC=True, logs_timestamp=True, role_dbus=False, role_h1=True, role_mqtt=False, role_raw_file=True, role_raw_proxy=False, role_ws=True, shared=False, ssl_client_use_os_ca_certs=True, ssl_server_with_ecdh_cert=False, with_hubbub=False, with_libevent=False, with_libmount=False, with_libuv=False, with_sqlite3=False, with_ssl=openssl, with_zlib=False, without_client=False, without_server=False, openssl:386=False, openssl:fPIC=True, openssl:no_aria=False, openssl:no_asm=False, openssl:no_async=False, openssl:no_bf=False, openssl:no_blake2=False, openssl:no_camellia=False, openssl:no_cast=False, openssl:no_chacha=False, openssl:no_cms=False, openssl:no_comp=False, openssl:no_ct=False, openssl:no_deprecated=False, openssl:no_des=False, openssl:no_dgram=False, openssl:no_dh=False, openssl:no_dsa=False, openssl:no_dso=False, openssl:no_engine=False, openssl:no_filenames=False, openssl:no_gost=False, openssl:no_hmac=False, openssl:no_idea=False, openssl:no_md4=False, openssl:no_md5=False, openssl:no_mdc2=False, openssl:no_ocsp=False, openssl:no_pinshared=False, openssl:no_rc2=False, openssl:no_rmd160=False, openssl:no_rsa=False, openssl:no_sha=False, openssl:no_sm2=False, openssl:no_sm3=False, openssl:no_sm4=False, openssl:no_srp=False, openssl:no_srtp=False, openssl:no_sse2=False, openssl:no_ssl=False, openssl:no_threads=False, openssl:no_ts=False, openssl:no_whirlpool=False, openssl:openssldir=None, openssl:shared=False
- Dependencies: openssl/1.1.1i
- Requirements: openssl/1.Y.Z
- Package ID: 3fd75f671b324a6eb8f40d39eaada178b0fc03a8

ERROR: Missing prebuilt package for 'libwebsockets/4.1.6'
Try to build from sources with '--build=libwebsockets'
Use 'conan search <reference> --table table.html'
Or read 'http://docs.conan.io/en/latest/faq/troubleshooting.html#error-missing-prebuilt-package'