diff --git a/kweather/CMakeLists.txt b/kweather/CMakeLists.txt
index 075266b..6b28670 100644
--- a/kweather/CMakeLists.txt
+++ b/kweather/CMakeLists.txt
@@ -51,11 +51,14 @@ if( NOT PERL_EXECUTABLE )
   include( FindPerl )
 endif( )
 
-execute_process(
+add_custom_command(
+    OUTPUT stations.dat weather_stations.desktop
     COMMAND ${PERL_EXECUTABLE} ${CMAKE_CURRENT_SOURCE_DIR}/genstations.pl
         ${CMAKE_CURRENT_SOURCE_DIR}/data/nsd_cccc.txt
         ${CMAKE_CURRENT_SOURCE_DIR}/data/station_names.txt
         ${CMAKE_CURRENT_SOURCE_DIR}/weather_stations.desktop.in
+    DEPENDS
+        data/nsd_cccc.txt data/station_names.txt weather_stations.desktop.in
     WORKING_DIRECTORY ${CMAKE_CURRENT_BINARY_DIR}
 )