Index: uspace/lib/libc/arch/amd64/Makefile.inc
===================================================================
--- uspace/lib/libc/arch/amd64/Makefile.inc	(revision 46d8eb9b258c351fc7a0ec7a45162776b8adc3a2)
+++ uspace/lib/libc/arch/amd64/Makefile.inc	(revision 0c4f46a603589b7cb4d0b2cf3fef9dea77569007)
@@ -30,6 +30,10 @@
 #
 
+ifndef CROSS_PREFIX
+	CROSS_PREFIX = /usr/local
+endif
+
 TARGET = amd64-linux-gnu
-TOOLCHAIN_DIR = /usr/local/amd64/bin
+TOOLCHAIN_DIR = $(CROSS_PREFIX)/amd64/bin
 
 ARCH_SOURCES += arch/$(ARCH)/src/syscall.S \