Index: gr-lida.pro
--- gr-lida.pro.orig
+++ gr-lida.pro
@@ -21,7 +21,7 @@ RCC_DIR += build
 OBJECTS_DIR += build
 
 # ###### Compiler, tools and options
-CONFIG += qt warn_on thread release
+CONFIG += qt warn_on thread release use_zlib
 
 # Examples:
 #CONFIG += qt warn_on thread release