diff --git a/deps/lgw/makefile b/deps/lgw/makefile
index a7e93c60..326b6910 100644
--- a/deps/lgw/makefile
+++ b/deps/lgw/makefile
@@ -49,10 +49,10 @@ ${LGWLIB}: ${PLT}/libloragw/libloragw.a
 	@cp $< $@
 
 ${PLT}/libloragw/libloragw.a: ${SRCS} ${HFILES}
-	${MAKE} -C ${PLT}/libloragw libloragw.a CC=${CC} AR=${AR} LD=${LD} TDfull=${TDfull}
+	${MAKE} -C ${PLT}/libloragw libloragw.a CC="${CC}" AR="${AR}" LD="${LD}" TDfull=${TDfull}
 
 ${PLT}/libloragw/inc/config.h: ${PLT}/libloragw/library.cfg
-	${MAKE} -C ${PLT}/libloragw inc/config.h CC=${CC} AR=${AR} LD=${LD} TDfull=${TDfull}
+	${MAKE} -C ${PLT}/libloragw inc/config.h CC="${CC}" AR="${AR}" LD="${LD}" TDfull=${TDfull}
 
 ${LGWINC}/%.h: ${PLT}/libloragw/inc/%.h | ${LGWINC}
 	@echo "  CP    ${<F} -> $@"
diff --git a/deps/lgw1302/makefile b/deps/lgw1302/makefile
index 2bac66b8..4f6e5580 100644
--- a/deps/lgw1302/makefile
+++ b/deps/lgw1302/makefile
@@ -49,10 +49,10 @@ ${LGWLIB}: ${PLT}/libloragw/libloragw.a
 	@cp $< $@
 
 ${PLT}/libloragw/libloragw.a: ${SRCS} ${HFILES}
-	${MAKE} -C ${PLT}/libloragw libloragw.a CC=${CC} AR=${AR} LD=${LD} TDfull=${TDfull}
+	${MAKE} -C ${PLT}/libloragw libloragw.a CC="${CC}" AR="${AR}" LD="${LD}" TDfull=${TDfull}
 
 ${PLT}/libloragw/inc/config.h: ${PLT}/libloragw/library.cfg
-	${MAKE} -C ${PLT}/libloragw inc/config.h CC=${CC} AR=${AR} LD=${LD} TDfull=${TDfull}
+	${MAKE} -C ${PLT}/libloragw inc/config.h CC="${CC}" AR="${AR}" LD="${LD}" TDfull=${TDfull}
 
 ${LGWINC}/%.h: ${PLT}/libloragw/inc/%.h | ${LGWINC}
 	@echo "  CP    ${<F} -> $@"
diff --git a/setup.gmk b/setup.gmk
index a123556f..27257811 100644
--- a/setup.gmk
+++ b/setup.gmk
@@ -49,7 +49,7 @@ ARCH.kerlink = arm-klk-linux-gnueabi
 ARCH=${ARCH.${platform}}
 
 export TDfull := $(shell cd ${TD} && pwd)
-TOOLCHAIN=${HOME}/toolchain-${platform}
+TOOLCHAIN ?= ${HOME}/toolchain-${platform}
 
 
 ifeq (,$(wildcard ${TOOLCHAIN}))
@@ -65,11 +65,11 @@ else
 TOOLPREFIX=${TOOLCHAIN}/bin/${ARCH}-
 endif
 
-CC=${TOOLPREFIX}gcc
-LD=${TOOLPREFIX}ld
-AR=${TOOLPREFIX}ar
-OD=${TOOLPREFIX}objdump
-OC=${TOOLPREFIX}objcopy
+CC ?= ${TOOLPREFIX}gcc
+LD ?= ${TOOLPREFIX}ld
+AR ?= ${TOOLPREFIX}ar
+OD ?= ${TOOLPREFIX}objdump
+OC ?= ${TOOLPREFIX}objcopy
 
 ifeq (kerlink,${platform})
 # Needed for loader to find libmpfr.so.4