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conan install libcurl/7.69.1@ --profile=/Users/jenkins/w/BuildSingleReference@2/1700/0dc72ec8-dcf3-4c45-b2a0-d53c47ff72e2/profile.txt --build=libcurl
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Configuration:
[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]
libcurl:shared=False
[build_requires]
[env]

libcurl/7.69.1: Forced build from source
Installing package: libcurl/7.69.1
Requirements
    libcurl/7.69.1 from 'conan-upstream' - Cache
    zlib/1.2.11 from 'conan-center' - Cache
Packages
    libcurl/7.69.1:b5226bcfb80c62f6afd914990cba48fd26cb51ee - Build
    zlib/1.2.11:647afeb69d3b0a2d3d316e80b24d38c714cc6900 - Download
Build requirements
    autoconf/2.69 from 'conan-center' - Cache
    automake/1.16.2 from 'conan-center' - Cache
    libtool/2.4.6 from 'conan-center' - Cache
    m4/1.4.18 from 'conan-center' - Cache
    pkgconf/1.7.3 from 'conan-center' - Cache
Build requirements packages
    autoconf/2.69:cc471ed355602ffa7007968c83aa4e7e648a38b5 - Download
    automake/1.16.2:3c28ba69276b46fd46e9c2060ba991d725ccab43 - Download
    libtool/2.4.6:f82f59608a22017ca5ceea2114611456d4373a12 - Missing
    m4/1.4.18:f83037eff23ab3a94190d7f3f7b37a2d6d522241 - Download
    pkgconf/1.7.3:647afeb69d3b0a2d3d316e80b24d38c714cc6900 - Missing

Installing (downloading, building) binaries...

ERROR: Missing binary: libtool/2.4.6:f82f59608a22017ca5ceea2114611456d4373a12
ERROR: Missing binary: pkgconf/1.7.3:647afeb69d3b0a2d3d316e80b24d38c714cc6900
pkgconf/1.7.3: WARN: Can't find a 'pkgconf/1.7.3' package for the specified settings, options and dependencies:
- Settings: arch=x86_64, build_type=Release, compiler=apple-clang, compiler.version=12.0, os=Macos
- Options: fPIC=True, shared=False
- Dependencies: 
- Requirements: 
- Package ID: 647afeb69d3b0a2d3d316e80b24d38c714cc6900

ERROR: Missing prebuilt package for 'libtool/2.4.6', 'pkgconf/1.7.3'
Try to build from sources with '--build=libtool --build=pkgconf'
Use 'conan search <reference> --table table.html'
Or read 'http://docs.conan.io/en/latest/faq/troubleshooting.html#error-missing-prebuilt-package'