diff --git a/Makefile b/Makefile
index 91401cf..c427d8e 100644
--- a/Makefile
+++ b/Makefile
@@ -1,9 +1,9 @@
 PACKAGE	= Framer
 VERSION	= 0.0.0
 SUBDIRS	= src
-RM	= rm -f
-LN	= ln -f
-TAR	= tar -czvf
+RM	?= rm -f
+LN	?= ln -f
+TAR	?= tar -czvf
 
 
 all: subdirs
diff --git a/src/Makefile b/src/Makefile
index 22f76a3..b4139ad 100644
--- a/src/Makefile
+++ b/src/Makefile
@@ -3,16 +3,16 @@ PREFIX	= /usr/local
 DESTDIR	=
 BINDIR	= $(PREFIX)/bin
 CC	= cc
-CPPFLAGSF=
+CPPFLAGSF?=
 CPPFLAGS= -I $(PREFIX)/include
 CFLAGSF	= -W `pkg-config --cflags gtk+-2.0`
 CFLAGS	= -Wall -g -O2
 LDFLAGSF= `pkg-config --libs gtk+-2.0`
 LDFLAGS	= -L$(PREFIX)/lib -Wl,-rpath,$(PREFIX)/lib
-RM	= rm -f
-LN	= ln -f
-MKDIR	= mkdir -p
-INSTALL	= install
+RM	?= rm -f
+LN	?= ln -f
+MKDIR	?= mkdir -p
+INSTALL	?= install
 
 
 all: $(TARGETS)