Could not find a package configuration file provided by "nlohmann_json"

[GorrieXIV]

Hi there,

Really excited to start using this library in my project, but running into this issue while trying to build.

I've specified nlohmann_json/3.9.1 in my conanfile, which is found and installed without issue when running conan install. I then have the following snippet in my CMakeLists.txt:

include(${CMAKE_BINARY_DIR}/conanbuildinfo.cmake)
conan_basic_setup()

Set(nlohmann_json_INSTALL_DIR ${CONAN_NLOHMANN_JSON_ROOT})
find_package(nlohmann_json 3.9.1 REQUIRED)

This is the exact same way I pull in Boost in a different project, however when running cmake, conan_basic_setup() runs without issue, which sets CONAN_NLOHMANN_JSON_ROOT, but then the script fails on find_package with the following output:

CMake Error at CMakeLists.txt:30 (find_package):
By not providing "Findnlohmann_json.cmake" in CMAKE_MODULE_PATH this
project has asked CMake to find a package configuration file provided by
"nlohmann_json", but CMake did not find one.

Could not find a package configuration file provided by "nlohmann_json"
(requested version 3.9.1) with any of the following names:

nlohmann_jsonConfig.cmake
nlohmann_json-config.cmake

Add the installation prefix of "nlohmann_json" to CMAKE_PREFIX_PATH or set
"nlohmann_json_DIR" to a directory containing one of the above files. If
"nlohmann_json" provides a separate development package or SDK, be sure it
has been installed.

-- Configuring incomplete, errors occurred!

Is there some merit to the recommendation in this error? I shouldn't need to change CMAKE_PREFIX_PATH.

Please advise if I am doing something wrong or if there may be a less obvious issue at hand. Thanks!

[k-styles]

@GorrieXIV Have you written a cmake file for this? If yes, can you provide it over here,

[falbrechtskirchinger]

Have you checked the documentation?
https://json.nlohmann.me/integration/package_managers/#conan