Index: AFLplusplus-2.63c/GNUmakefile
===================================================================
--- AFLplusplus-2.63c.orig/GNUmakefile
+++ AFLplusplus-2.63c/GNUmakefile
@@ -21,8 +21,8 @@ HASH=\#
 
 PREFIX     ?= /usr/local
 BIN_PATH    = $(PREFIX)/bin
-HELPER_PATH = $(PREFIX)/lib/afl
-DOC_PATH    = $(PREFIX)/share/doc/afl
+HELPER_PATH = $(LIBEXEC_DIR)/afl
+DOC_PATH    = $(DOC_DIR)/afl
 MISC_PATH   = $(PREFIX)/share/afl
 MAN_PATH    = $(PREFIX)/man/man8