Getting ready to generate new zlib package binaries (#1106).

CMakeLists.txt

@@ -22,6 +22,7 @@ OPTION(USE_PREBUILT_QSCINTILLA_PLUGIN "Use the pre-built version of the QScintil
 OPTION(USE_PREBUILT_QWT_PLUGIN "Use the pre-built version of the Qwt plugin" ON)
 OPTION(USE_PREBUILT_SUNDIALS_PLUGIN "Use the pre-built version of the SUNDIALS plugin" ON)
 OPTION(USE_PREBUILT_ZLIB_PLUGIN "Use the pre-built version of the zlib plugin" ON)
+SET(USE_PREBUILT_ZLIB_PLUGIN OFF)
 
 # Initialise the project
 
@@ -416,6 +417,9 @@ SET(PLUGINS
     ${SAMPLE_PLUGINS}
     ${TEST_PLUGINS}
 )
+SET(PLUGINS
+    thirdParty/zlib
+)
 
 FOREACH(PLUGIN ${PLUGINS})
     SET(PLUGIN_DIR src/plugins/${PLUGIN})