--- a/Makefile	2017-05-15 17:33:05.132803923 -0700
+++ b/Makefile	2017-05-16 16:01:29.264842369 -0700
@@ -35,6 +35,13 @@
 TIGR_SRC_DIR  := $(TOP_DIR)/src/tigr
 KURTZ_SRC_DIR := $(TOP_DIR)/src/kurtz
 
+ifndef INSTALL_TOP_DIR
+INSTALL_TOP_DIR     := $(TOP_DIR)
+endif
+INSTALL_BIN_DIR := $(INSTALL_TOP_DIR)/bin
+INSTALL_AUX_BIN_DIR := $(INSTALL_TOP_DIR)/aux_bin
+INSTALL_SCRIPT_DIR    := $(INSTALL_TOP_DIR)/scripts
+
 CC   := $(filter /%,$(shell /bin/sh -c 'type gcc'))
 CXX  := $(filter /%,$(shell /bin/sh -c 'type g++'))
 SED  := $(filter /%,$(shell /bin/sh -c 'type sed'))
@@ -52,6 +59,7 @@
 
 #-- EXPORT THESE VARIABLES TO OTHER MAKEFILES
 export BIN_DIR AUX_BIN_DIR CXX CC CFLAGS CXXFLAGS LDFLAGS
+export INSTALL_BIN_DIR INSTALL_AUX_BIN_DIR INSTALL_SCRIPT_DIR