Index: head/usr.bin/xinstall/Makefile
===================================================================
--- head/usr.bin/xinstall/Makefile
+++ head/usr.bin/xinstall/Makefile
@@ -11,7 +11,6 @@
 .PATH:		${SRCTOP}/contrib/mtree
 CFLAGS+=	-I${SRCTOP}/contrib/mtree
 CFLAGS+=	-I${SRCTOP}/lib/libnetbsd
-CFLAGS+=	-DHAVE_STRUCT_STAT_ST_FLAGS=1
 
 LIBADD=	md
 
Index: head/usr.bin/xinstall/xinstall.c
===================================================================
--- head/usr.bin/xinstall/xinstall.c
+++ head/usr.bin/xinstall/xinstall.c
@@ -75,6 +75,17 @@
 
 #include "mtree.h"
 
+/*
+ * We need to build xinstall during the bootstrap stage when building on a
+ * non-FreeBSD system. Linux does not have the st_flags and st_birthtime
+ * members in struct stat so we need to omit support for changing those fields.
+ */
+#ifdef UF_SETTABLE
+#define HAVE_STRUCT_STAT_ST_FLAGS 1
+#else
+#define HAVE_STRUCT_STAT_ST_FLAGS 0
+#endif
+
 #define MAX_CMP_SIZE	(16 * 1024 * 1024)
 
 #define	LN_ABSOLUTE	0x01