diff --git a/examples/lm3s/Makefile.include b/examples/lm3s/Makefile.include
index 24248325..0eafe7d3 100644
--- a/examples/lm3s/Makefile.include
+++ b/examples/lm3s/Makefile.include
@@ -25,7 +25,7 @@ LD		= $(PREFIX)-gcc
 OBJCOPY		= $(PREFIX)-objcopy
 OBJDUMP		= $(PREFIX)-objdump
 # Uncomment this line if you want to use the installed (not local) library.
-# TOOLCHAIN_DIR = `dirname \`which $(CC)\``/../$(PREFIX)
+# TOOLCHAIN_DIR := $(shell dirname `which $(CC)`)/../$(PREFIX)
 TOOLCHAIN_DIR   = ../../../..
 CFLAGS		+= -O0 -g3 -Wall -Wextra -I$(TOOLCHAIN_DIR)/include -fno-common \
 		   -mcpu=cortex-m3 -mthumb -MD
diff --git a/examples/lpc13xx/Makefile.include b/examples/lpc13xx/Makefile.include
index fe2c3ba0..948d6c45 100644
--- a/examples/lpc13xx/Makefile.include
+++ b/examples/lpc13xx/Makefile.include
@@ -25,7 +25,7 @@ LD		= $(PREFIX)-gcc
 OBJCOPY		= $(PREFIX)-objcopy
 OBJDUMP		= $(PREFIX)-objdump
 # Uncomment this line if you want to use the installed (not local) library.
-# TOOLCHAIN_DIR = `dirname \`which $(CC)\``/../$(PREFIX)
+# TOOLCHAIN_DIR := $(shell dirname `which $(CC)`)/../$(PREFIX)
 TOOLCHAIN_DIR   = ../../../..
 CFLAGS		+= -Os -g -Wall -Wextra -I$(TOOLCHAIN_DIR)/include -fno-common \
 		   -mcpu=cortex-m3 -mthumb -MD
diff --git a/examples/stm32/Makefile.include b/examples/stm32/Makefile.include
index a4512e9a..3e306384 100644
--- a/examples/stm32/Makefile.include
+++ b/examples/stm32/Makefile.include
@@ -26,7 +26,7 @@ OBJCOPY		= $(PREFIX)-objcopy
 OBJDUMP		= $(PREFIX)-objdump
 GDB		= $(PREFIX)-gdb
 # Uncomment this line if you want to use the installed (not local) library.
-# TOOLCHAIN_DIR = `dirname \`which $(CC)\``/../$(PREFIX)
+# TOOLCHAIN_DIR := $(shell dirname `which $(CC)`)/../$(PREFIX)
 TOOLCHAIN_DIR   = ../../../..
 CFLAGS		+= -Os -g -Wall -Wextra -I$(TOOLCHAIN_DIR)/include \
 		   -fno-common -mcpu=cortex-m3 -mthumb -msoft-float -MD