After downloading and extracting Geany's JSON Prettifier, and installing yajl, the make command does raise this error:
/bin/sh: 1: pkg-config: not found
./geany_json_prettifier.c:32:25: fatal error: geanyplugin.h: No such file or directory
compilation terminated.
Makefile:16: recipe for target 'build' failed
make: *** [build] Error 1
What is left in the system's configuration or Makefile to make it work?
Update: under Lubuntu 16.04.
apt install geany-plugin-devhelpsolves your problem? Not quite sure about it.JSON Prettifieris a third-party plugin, you have to deal with it on your own.