--- a/src/ccache.cpp
+++ b/src/ccache.cpp
-@@ -1743,6 +1743,7 @@ get_manifest_key(Context& ctx, Hash& hash)
+@@ -1762,6 +1762,7 @@ get_manifest_key(Context& ctx, Hash& hash)
"CPLUS_INCLUDE_PATH",
"OBJC_INCLUDE_PATH",
"OBJCPLUS_INCLUDE_PATH", // clang