Index: uspace/srv/loader/arch/amd64/Makefile.inc
===================================================================
--- uspace/srv/loader/arch/amd64/Makefile.inc	(revision 82a04c6d4cedfa8e557149797bfda87ae5da22d7)
+++ uspace/srv/loader/arch/amd64/Makefile.inc	(revision 8416d463d2cdec1889f4d2b04c2a701b948130de)
@@ -27,4 +27,4 @@
 #
 
-CFLAGS += -D__64_BITS__
+EXTRA_CFLAGS = -D__64_BITS__
 ARCH_SOURCES := arch/$(UARCH)/amd64.s
Index: uspace/srv/loader/arch/arm32/Makefile.inc
===================================================================
--- uspace/srv/loader/arch/arm32/Makefile.inc	(revision 82a04c6d4cedfa8e557149797bfda87ae5da22d7)
+++ uspace/srv/loader/arch/arm32/Makefile.inc	(revision 8416d463d2cdec1889f4d2b04c2a701b948130de)
@@ -27,4 +27,4 @@
 #
 
-CFLAGS += -D__32_BITS__
+EXTRA_CFLAGS = -D__32_BITS__
 ARCH_SOURCES := arch/$(UARCH)/arm32.s
Index: uspace/srv/loader/arch/ia32/Makefile.inc
===================================================================
--- uspace/srv/loader/arch/ia32/Makefile.inc	(revision 82a04c6d4cedfa8e557149797bfda87ae5da22d7)
+++ uspace/srv/loader/arch/ia32/Makefile.inc	(revision 8416d463d2cdec1889f4d2b04c2a701b948130de)
@@ -27,4 +27,4 @@
 #
 
-CFLAGS += -D__32_BITS__
+EXTRA_CFLAGS = -D__32_BITS__
 ARCH_SOURCES := arch/$(UARCH)/ia32.s
Index: uspace/srv/loader/arch/ia64/Makefile.inc
===================================================================
--- uspace/srv/loader/arch/ia64/Makefile.inc	(revision 82a04c6d4cedfa8e557149797bfda87ae5da22d7)
+++ uspace/srv/loader/arch/ia64/Makefile.inc	(revision 8416d463d2cdec1889f4d2b04c2a701b948130de)
@@ -27,5 +27,5 @@
 #
 
-CFLAGS += -D__64_BITS__
+EXTRA_CFLAGS = -D__64_BITS__
 ARCH_SOURCES := arch/$(UARCH)/ia64.s
 AFLAGS += -xexplicit
Index: uspace/srv/loader/arch/mips32/Makefile.inc
===================================================================
--- uspace/srv/loader/arch/mips32/Makefile.inc	(revision 82a04c6d4cedfa8e557149797bfda87ae5da22d7)
+++ uspace/srv/loader/arch/mips32/Makefile.inc	(revision 8416d463d2cdec1889f4d2b04c2a701b948130de)
@@ -27,4 +27,4 @@
 #
 
-CFLAGS += -D__32_BITS__
+EXTRA_CFLAGS = -D__32_BITS__
 ARCH_SOURCES := arch/$(UARCH)/mips32.s
Index: uspace/srv/loader/arch/ppc32/Makefile.inc
===================================================================
--- uspace/srv/loader/arch/ppc32/Makefile.inc	(revision 82a04c6d4cedfa8e557149797bfda87ae5da22d7)
+++ uspace/srv/loader/arch/ppc32/Makefile.inc	(revision 8416d463d2cdec1889f4d2b04c2a701b948130de)
@@ -27,4 +27,4 @@
 #
 
-CFLAGS += -D__32_BITS__
+EXTRA_CFLAGS = -D__32_BITS__
 ARCH_SOURCES := arch/$(UARCH)/ppc32.s
Index: uspace/srv/loader/arch/sparc64/Makefile.inc
===================================================================
--- uspace/srv/loader/arch/sparc64/Makefile.inc	(revision 82a04c6d4cedfa8e557149797bfda87ae5da22d7)
+++ uspace/srv/loader/arch/sparc64/Makefile.inc	(revision 8416d463d2cdec1889f4d2b04c2a701b948130de)
@@ -27,4 +27,4 @@
 #
 
-CFLAGS += -D__64_BITS__
+EXTRA_CFLAGS = -D__64_BITS__
 ARCH_SOURCES := arch/$(UARCH)/sparc64.s