Index: colobot/data/CMakeLists.txt
===================================================================
--- colobot.orig/data/CMakeLists.txt	2015-05-20 23:33:27.282246180 +0200
+++ colobot/data/CMakeLists.txt	2015-05-20 23:33:01.048498516 +0200
@@ -22,6 +22,6 @@
 add_subdirectory(help)
 add_subdirectory(levels)
 
-if(EXISTS music)
+if(EXISTS ${CMAKE_CURRENT_SOURCE_DIR}/music)
     add_subdirectory(music)
 endif()