Index: uspace/lib/libc/Makefile
===================================================================
--- uspace/lib/libc/Makefile	(revision 079f4402537f59cd1c6af7767c212795b7015ffd)
+++ uspace/lib/libc/Makefile	(revision 48e1467a35ae7c97a4fc224626d5e0a0eab5ecb0)
@@ -28,5 +28,5 @@
 #
 
-include ../../../Makefile.config
+-include ../../../Makefile.config
 
 USPACE_PREFIX = $(shell pwd)/../..
Index: uspace/lib/libc/Makefile.toolchain
===================================================================
--- uspace/lib/libc/Makefile.toolchain	(revision 079f4402537f59cd1c6af7767c212795b7015ffd)
+++ uspace/lib/libc/Makefile.toolchain	(revision 48e1467a35ae7c97a4fc224626d5e0a0eab5ecb0)
@@ -59,7 +59,7 @@
 #
 
-include $(LIBC_PREFIX)/../../../Makefile.config
-include $(LIBC_PREFIX)/../../../config.defs
-include $(LIBC_PREFIX)/arch/$(UARCH)/Makefile.inc
+-include $(LIBC_PREFIX)/../../../Makefile.config
+-include $(LIBC_PREFIX)/../../../config.defs
+-include $(LIBC_PREFIX)/arch/$(UARCH)/Makefile.inc
 
 ## Simple detection of the host system