diff -ruN a/Make.Rules b/Make.Rules
--- a/Make.Rules	2020-11-03 02:38:59.000000000 +0100
+++ b/Make.Rules	2020-11-06 16:55:10.149893784 +0100
@@ -37,7 +37,7 @@
 # Target directories
 
 MANDIR=$(man_prefix)/man
-SBINDIR=$(exec_prefix)/sbin
+SBINDIR=$(exec_prefix)/bin
 INCDIR=$(inc_prefix)/include
 LIBDIR=$(lib_prefix)/$(lib)
 PKGCONFIGDIR=$(LIBDIR)/pkgconfig
@@ -79,7 +79,7 @@
 SYSTEM_HEADERS = /usr/include
 INCS=$(topdir)/libcap/include/sys/capability.h
 LDFLAGS += -L$(topdir)/libcap
-CFLAGS += -Dlinux $(WARNINGS) $(DEBUG)
+CFLAGS += $(CPPFLAGS) -Dlinux $(WARNINGS) $(DEBUG)
 INDENT := $(shell if [ -n "$$(which indent 2>/dev/null)" ]; then echo "| indent -kr" ; fi)
 
 # SHARED tracks whether or not the SHARED libraries (libcap.so,