Conan: Missing prebuilt package for zlib on MacOS, can't build zlib from source

[acgetchell]

I'm starting a brand new project, and trying to get it to work with conan:

https://github.com/acgetchell/causal-sets-explorer

So if I attempt to run conan install I get:
~~~
┌─[adam][hapkido][±][master U:1 ✗][~/causal-sets-explorer/build]
└─▪ conan install .. -s compiler=apple-clang -s compiler.version=7.0 -s compiler.libcxx=libc++
Requirements
Boost/1.63.0@eliaskousk/stable from conan.io
bzip2/1.0.6@lasote/stable from conan.io
zlib/1.2.8@lasote/stable from local
Packages
Boost/1.63.0@eliaskousk/stable:c4bfd0242b2bd6f833cf3dd15d54fa9aa1903ad1
bzip2/1.0.6@lasote/stable:19a77801894e2653b36aa2027b1b7c8609c33464
zlib/1.2.8@lasote/stable:4caa2a31f011ce34decef2908249751dac029ed3

bzip2/1.0.6@lasote/stable: Already installed!
WARN: Can't find a 'zlib/1.2.8@lasote/stable' package for the specified options and settings:

• Settings: arch=x86_64, build_type=Release, compiler=apple-clang, compiler.libcxx=libc++, compiler.version=7.0, os=Macos
• Options: shared=True

ERROR: Missing prebuilt package for 'zlib/1.2.8@lasote/stable'
Try to build it from sources with "--build zlib"
Or read "http://docs.conan.io/en/latest/faq/troubleshooting.html#error-missing-prebuilt-package"
~~~

But the suggested fix doesn't work either:

~~~
┌─[adam][hapkido][±][master U:1 ✗][~/causal-sets-explorer/build]
└─▪ conan install .. -s compiler=apple-clang -s compiler.version=7.0 -s compiler.libcxx=libc++ --build zlib
Requirements
Boost/1.63.0@eliaskousk/stable from conan.io
bzip2/1.0.6@lasote/stable from conan.io
zlib/1.2.8@lasote/stable from local
Packages
Boost/1.63.0@eliaskousk/stable:c4bfd0242b2bd6f833cf3dd15d54fa9aa1903ad1
bzip2/1.0.6@lasote/stable:19a77801894e2653b36aa2027b1b7c8609c33464
zlib/1.2.8@lasote/stable:4caa2a31f011ce34decef2908249751dac029ed3

bzip2/1.0.6@lasote/stable: Already installed!
zlib/1.2.8@lasote/stable: WARN: Forced build from source
ERROR: Error while trying to get recipe sources for zlib/1.2.8@lasote/stable. No remote defined
~~~

[kent-at-multiscale]

zlib/1.2.8@lasote/stable from local

That means you exported the zlib recipe locally somehow. Try doing a conan remove zlib/1.2.8@lasote/stable and re-run the install. It will fetch the recipe from conan.io again.

[acgetchell]

Thanks, that fixed it! I've referenced this in my project in case anyone else comes across it.