diff --git a/Makefile b/Makefile
index a1eabbb..0433735 100644
--- a/Makefile
+++ b/Makefile
@@ -5,7 +5,10 @@
 
 # $Id: Makefile 2015-06-05 22:54:18 nineties $
 
-LIBDIR = /usr/lib
+include config.mk
+
+BINDIR = ${PREFIX}/usr/bin
+LIBDIR = ${PREFIX}/usr/lib
 
 all: 
 	cd rowl0; $(MAKE)
@@ -13,6 +16,7 @@ all:
 
 install:
 	cd amber; $(MAKE) install_binaries install_libraries
+	sed -i -e "s|PREFIX|$(PREFIX)|g" $(BINDIR)/amber
 	mkdir -p $(LIBDIR)/amber
 	cp -ur lib/* $(LIBDIR)/amber
 	@echo exit | amber --preparse > /dev/null
diff --git a/README.md b/README.md
index 3a5fcfb..3ba6ba3 100644
--- a/README.md
+++ b/README.md
@@ -29,6 +29,12 @@ Amber can be compiled only in Linux environment now.
     % make
     % make install
 
+Alternatively, if you would like to install it to a local prefix:
+
+* Set `PREFIX` in config.mk to the desired location
+* `export PATH=$PREFIX/usr/bin:$PREFIX/amber/usr/lib/amber/bin:$PATH`
+* `export LD_LIBRARY_PATH=$PREFIX/usr/lib/`
+
 License
 -------
 Amber is published under the MIT License. See COPYING for the details of this
diff --git a/amber/Makefile b/amber/Makefile
index 1b8785c..02c4dc1 100644
--- a/amber/Makefile
+++ b/amber/Makefile
@@ -5,10 +5,12 @@
 
 # $Id: Makefile 2015-06-10 18:51:57 nineties $
 
+include ../config.mk
+
 TOPDIR = ..
 ROWL0DIR = $(TOPDIR)/rowl0
-BINDIR = /usr/bin
-LIBDIR = /usr/lib
+BINDIR = $(PREFIX)/usr/bin
+LIBDIR = $(PREFIX)/usr/lib
 
 AS = as
 ASFLAGS = --32
diff --git a/amber/amber b/amber/amber
index 13833ae..4aedb69 100755
--- a/amber/amber
+++ b/amber/amber
@@ -1,2 +1,2 @@
 #!/bin/sh
-/usr/lib/amber/bin/rlvm /usr/lib/amber/bin/amberi ${@+"$@"}
+PREFIX/usr/lib/amber/bin/rlvm PREFIX/usr/lib/amber/bin/amberi ${@+"$@"}
diff --git a/config.mk b/config.mk
new file mode 100644
index 0000000..716dac9
--- /dev/null
+++ b/config.mk
@@ -0,0 +1 @@
+PREFIX=/