find_package: can't find "jansson" library

Hi, cmake can’t find “jansson” library:

[cmake] CMake Error at CMakeLists.txt:187 (find_package):
[cmake]   Could not find a package configuration file provided by "jansson" with any
[cmake]   of the following names:
[cmake] 
[cmake]     jansson.cps
[cmake]     janssonConfig.cmake
[cmake]     jansson-config.cmake
[cmake] 
[cmake]   Add the installation prefix of "jansson" to CMAKE_PREFIX_PATH or set
[cmake]   "jansson_DIR" to a directory containing one of the above files.  If
[cmake]   "jansson" provides a separate development package or SDK, be sure it has
[cmake]   been installed.

The dev package doesn’t have these files, indeed:

$ rpm -ql jansson-devel 
/usr/include/jansson.h
/usr/include/jansson_config.h
/usr/lib64/libjansson.so
/usr/lib64/pkgconfig/jansson.pc

I’m doubt who is the culprit here, any help?