Index: uspace/lib/libc/arch/amd64/Makefile.inc
===================================================================
--- uspace/lib/libc/arch/amd64/Makefile.inc	(revision fa23560fdd0e695738620af86112b84932e3b3e3)
+++ uspace/lib/libc/arch/amd64/Makefile.inc	(revision ddb0df58c37d07e66431a6471044949a96ecaf7d)
@@ -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 \