diff -Naur libcap-2.65.orig/Make.Rules libcap-2.65/Make.Rules
--- libcap-2.65.orig/Make.Rules	2022-08-25 21:32:12.478981513 -0400
+++ libcap-2.65/Make.Rules	2022-08-25 21:33:55.027444454 -0400
@@ -63,7 +63,7 @@
 KERNEL_HEADERS := $(topdir)/libcap/include/uapi
 LIBCAP_INCLUDES = -I$(KERNEL_HEADERS) -I$(topdir)/libcap/include
 DEFINES := -D_LARGEFILE64_SOURCE -D_FILE_OFFSET_BITS=64
-SYSTEM_HEADERS = /usr/include
+SYSTEM_HEADERS = $(SYSROOT)/usr/include
 
 SUDO := sudo
 CC := $(CROSS_COMPILE)gcc
@@ -121,7 +121,7 @@
 # Force enabled with "make DYNAMIC=yes ...".
 DYNAMIC := $(shell if [ ! -d "$(topdir)/.git" ]; then echo $(SHARED); else echo no ; fi)
 
-PAM_CAP ?= $(shell if [ -f /usr/include/security/pam_modules.h ]; then echo $(SHARED) ; else echo no ; fi)
+PAM_CAP ?= $(shell if [ -f $(SYSTEM_HEADERS)/security/pam_modules.h ]; then echo $(SHARED) ; else echo no ; fi)
 
 # If your system does not support pthreads, override this as "no".
 #