https://bugs.gentoo.org/831079
--- a/mono/btls/CMakeLists.txt
+++ b/mono/btls/CMakeLists.txt
@@ -12,11 +12,6 @@ endif()
 enable_language(C)
 enable_language(CXX)
 
-find_program(CCACHE_PROGRAM ccache)
-if(CCACHE_PROGRAM)
-    set_property(GLOBAL PROPERTY RULE_LAUNCH_COMPILE "${CCACHE_PROGRAM}")
-endif()
-
 if (MSVC OR CYGWIN)
 	set(BTLS_HOST_WIN32 1)
 endif ()
@@ -129,4 +124,4 @@ endif ()
 
 if (CYGWIN)
 	target_link_libraries (mono-btls-shared wsock32 ws2_32)
-endif ()
\ No newline at end of file
+endif ()