disabled the use of ccache, to prevent FTBFS; as the compilation is done once
it has no backdraws to make the debian package.
Index: supercollider/CMakeLists.txt
===================================================================
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -150,12 +150,12 @@ add_definitions(-DBOOST_CHRONO_HEADER_ON
 #############################################
 # Detect CCache
 
-find_program(CCacheExectuable ccache)
-if( CCacheExectuable )
-  # only used with >=cmake-3.4
-  set( CMAKE_C_COMPILER_LAUNCHER   "${CCacheExectuable}" )
-  set( CMAKE_CXX_COMPILER_LAUNCHER "${CCacheExectuable}" )
-endif()
+## find_program(CCacheExecutable ccache)
+## if( CCacheExecutable )
+##   # only used with >=cmake-3.4
+##   set( CMAKE_C_COMPILER_LAUNCHER   "${CCacheExecutable}" )
+##   set( CMAKE_CXX_COMPILER_LAUNCHER "${CCacheExecutable}" )
+## endif()
 
 #############################################
 # Options