try a different target + build less

"they" do not maintain the CMake scripts so this will be fun open-source-parsers/jsoncpp#455 (comment)

Author: prince-chrismc

.github/actions/install/open-source-parsers-jsoncpp/action.yml

@@ -16,7 +16,7 @@ runs:
         # https://github.com/open-source-parsers/jsoncpp/blob/69098a18b9af0c47549d9a271c054d13ca92b006/include/PreventInSourceBuilds.cmake#L8
         mkdir build
         cd build
-        cmake .. -DJSONCPP_WITH_TESTS=OFF -DBUILD_SHARED_LIBS=OFF
+        cmake .. -DJSONCPP_WITH_TESTS=OFF -DBUILD_SHARED_LIBS=OFF -DBUILD_OBJECT_LIBS=OFF
         cmake --build .
         sudo cmake --install .
       shell: bash

example/traits/CMakeLists.txt

@@ -30,7 +30,7 @@ if(TARGET kazuho_picojson)
 endif()
 
 find_package(jsoncpp CONFIG)
-if(TARGET jsoncpp)
+if(TARGET jsoncpp_static)
   add_executable(open-source-parsers-jsoncpp open-source-parsers-jsoncpp.cpp)
-  target_link_libraries(open-source-parsers-jsoncpp jsoncpp jwt-cpp::jwt-cpp)
+  target_link_libraries(open-source-parsers-jsoncpp jsoncpp_static jwt-cpp::jwt-cpp)
 endif()