diff --git a/.gitignore b/.gitignore
index 496b9a2d5a..440a39b759 100644
--- a/.gitignore
+++ b/.gitignore
@@ -27,6 +27,7 @@ objs/
 temp/
 temp-python*
 lib/
+install/
 examples/csharp/solution/*.csproj
 examples/csharp/*.sln
 examples/notebook/.ipynb_checkpoints
@@ -80,4 +81,4 @@ tools/netstandard/CreateSigningKey/obj
 
 ortools/fsharp/**/bin
 ortools/fsharp/**/obj
-ortools/fsharp/**/packages
\ No newline at end of file
+ortools/fsharp/**/packages
diff --git a/makefiles/Makefile.cpp.mk b/makefiles/Makefile.cpp.mk
index 0d2844c48b..46dfebb044 100755
--- a/makefiles/Makefile.cpp.mk
+++ b/makefiles/Makefile.cpp.mk
@@ -10,6 +10,14 @@ else
 	@echo
 endif
 
+# Checks if the user has overwritten default install prefix.
+# cf https://www.gnu.org/prep/standards/html_node/Directory-Variables.html#index-prefix
+ifeq ($(SYSTEM),win)
+	prefix ?= C:\\Program Files\\or-tools
+else
+  prefix ?= /usr/local
+endif
+
 # Main target
 .PHONY: cc # Build C++ OR-Tools.
 cc: ortoolslibs ccexe
@@ -799,6 +807,46 @@ rcc: $(BIN_DIR)$S$(basename $(notdir $(EX)))$E
 	@echo running $(BIN_DIR)$S$(basename $(notdir $(EX)))$E
 	$(BIN_DIR)$S$(basename $(notdir $(EX)))$E $(ARGS)
 
+###############
+##  INSTALL  ##
+###############
+install_dirs:
+	-$(MKDIR) "$(prefix)"
+	-$(MKDIR) "$(prefix)$Slib"
+	-$(MKDIR) "$(prefix)$Sinclude"
+	-$(DELREC) "$(prefix)$Sinclude$Sortools"
+	$(MKDIR) "$(prefix)$Sinclude$Sortools"
+	$(MKDIR) "$(prefix)$Sinclude$Sortools$Salgorithms"
+	$(MKDIR) "$(prefix)$Sinclude$Sortools$Sbase"
+	$(MKDIR) "$(prefix)$Sinclude$Sortools$Sbop"
+	$(MKDIR) "$(prefix)$Sinclude$Sortools$Sconstraint_solver"
+	$(MKDIR) "$(prefix)$Sinclude$Sortools$Sglop"
+	$(MKDIR) "$(prefix)$Sinclude$Sortools$Sgraph"
+	$(MKDIR) "$(prefix)$Sinclude$Sortools$Slinear_solver"
+	$(MKDIR) "$(prefix)$Sinclude$Sortools$Slp_data"
+	$(MKDIR) "$(prefix)$Sinclude$Sortools$Ssat"
+	$(MKDIR) "$(prefix)$Sinclude$Sortools$Sutil"
+
+.PHONY: install_cc # Install C++ OR-Tools to $(prefix)/.
+install_cc: ortoolslibs $(PATCHELF) install_dirs
+	$(COPY) $(LIB_DIR)$S$(LIB_PREFIX)ortools.$(LIB_SUFFIX) "$(prefix)$Slib"
+	$(COPY) ortools$Salgorithms$S*.h "$(prefix)$Sinclude$Sortools$Salgorithms"
+	$(COPY) ortools$Sbase$S*.h "$(prefix)$Sinclude$Sortools$Sbase"
+	$(COPY) ortools$Sconstraint_solver$S*.h "$(prefix)$Sinclude$Sortools$Sconstraint_solver"
+	$(COPY) ortools$Sgen$Sortools$Sconstraint_solver$S*.pb.h "$(prefix)$Sinclude$Sortools$Sconstraint_solver"
+	$(COPY) ortools$Sbop$S*.h "$(prefix)$Sinclude$Sortools$Sbop"
+	$(COPY) ortools$Sgen$Sortools$Sbop$S*.pb.h "$(prefix)$Sinclude$Sortools$Sbop"
+	$(COPY) ortools$Sglop$S*.h "$(prefix)$Sinclude$Sortools$Sglop"
+	$(COPY) ortools$Sgen$Sortools$Sglop$S*.pb.h "$(prefix)$Sinclude$Sortools$Sglop"
+	$(COPY) ortools$Sgraph$S*.h "$(prefix)$Sinclude$Sortools$Sgraph"
+	$(COPY) ortools$Sgen$Sortools$Sgraph$S*.h "$(prefix)$Sinclude$Sortools$Sgraph"
+	$(COPY) ortools$Slinear_solver$S*.h "$(prefix)$Sinclude$Sortools$Slinear_solver"
+	$(COPY) ortools$Slp_data$S*.h "$(prefix)$Sinclude$Sortools$Slp_data"
+	$(COPY) ortools$Sgen$Sortools$Slinear_solver$S*.pb.h "$(prefix)$Sinclude$Sortools$Slinear_solver"
+	$(COPY) ortools$Ssat$S*.h "$(prefix)$Sinclude$Sortools$Ssat"
+	$(COPY) ortools$Sgen$Sortools$Ssat$S*.pb.h "$(prefix)$Sinclude$Sortools$Ssat"
+	$(COPY) ortools$Sutil$S*.h "$(prefix)$Sinclude$Sortools$Sutil"
+
 .PHONY: detect_cc # Show variables used to build C++ OR-Tools.
 detect_cc:
 	@echo Relevant info for the C++ build:
diff --git a/makefiles/Makefile.install.mk b/makefiles/Makefile.install.mk
index 88cb3070bc..459629f90a 100644
--- a/makefiles/Makefile.install.mk
+++ b/makefiles/Makefile.install.mk
@@ -1,54 +1,21 @@
-create_install_dirs:
-	-$(MKDIR) $(TARGET_DIR)
-	-$(MKDIR) $(TARGET_DIR)$Slib
-	-$(MKDIR) $(TARGET_DIR)$Sbin
-	-$(MKDIR) $(TARGET_DIR)$Sinclude
-	-$(MKDIR) $(TARGET_DIR)$Sinclude$Sgflags
-	-$(MKDIR) $(TARGET_DIR)$Sinclude$Sglog
-	-$(MKDIR) $(TARGET_DIR)$Sinclude$Sgoogle
-	-$(DELREC) $(TARGET_DIR)$Sinclude$Sortools
-	$(MKDIR) $(TARGET_DIR)$Sinclude$Sortools
-	$(MKDIR) $(TARGET_DIR)$Sinclude$Sortools$Salgorithms
-	$(MKDIR) $(TARGET_DIR)$Sinclude$Sortools$Sbase
-	$(MKDIR) $(TARGET_DIR)$Sinclude$Sortools$Sbop
-	$(MKDIR) $(TARGET_DIR)$Sinclude$Sortools$Sconstraint_solver
-	$(MKDIR) $(TARGET_DIR)$Sinclude$Sortools$Sglop
-	$(MKDIR) $(TARGET_DIR)$Sinclude$Sortools$Sgraph
-	$(MKDIR) $(TARGET_DIR)$Sinclude$Sortools$Slinear_solver
-	$(MKDIR) $(TARGET_DIR)$Sinclude$Sortools$Slp_data
-	$(MKDIR) $(TARGET_DIR)$Sinclude$Sortools$Ssat
-	$(MKDIR) $(TARGET_DIR)$Sinclude$Sortools$Sutil
+install_deps_dirs:
+	-$(MKDIR_P) "$(prefix)$Sinclude$Sgflags"
+	-$(MKDIR_P) "$(prefix)$Sinclude$Sglog"
+	-$(MKDIR_P) "$(prefix)$Sinclude$Sgoogle"
 
-install_cc: create_install_dirs cc $(PATCHELF)
-	$(COPY) $(LIB_DIR)$S$(LIB_PREFIX)ortools.$(LIB_SUFFIX) $(TARGET_DIR)$Slib
-	$(COPY) ortools$Salgorithms$S*.h $(TARGET_DIR)$Sinclude$Sortools$Salgorithms
-	$(COPY) ortools$Sbase$S*.h $(TARGET_DIR)$Sinclude$Sortools$Sbase
-	$(COPY) ortools$Sconstraint_solver$S*.h $(TARGET_DIR)$Sinclude$Sortools$Sconstraint_solver
-	$(COPY) ortools$Sgen$Sortools$Sconstraint_solver$S*.pb.h $(TARGET_DIR)$Sinclude$Sortools$Sconstraint_solver
-	$(COPY) ortools$Sbop$S*.h $(TARGET_DIR)$Sinclude$Sortools$Sbop
-	$(COPY) ortools$Sgen$Sortools$Sbop$S*.pb.h $(TARGET_DIR)$Sinclude$Sortools$Sbop
-	$(COPY) ortools$Sglop$S*.h $(TARGET_DIR)$Sinclude$Sortools$Sglop
-	$(COPY) ortools$Sgen$Sortools$Sglop$S*.pb.h $(TARGET_DIR)$Sinclude$Sortools$Sglop
-	$(COPY) ortools$Sgraph$S*.h $(TARGET_DIR)$Sinclude$Sortools$Sgraph
-	$(COPY) ortools$Sgen$Sortools$Sgraph$S*.h $(TARGET_DIR)$Sinclude$Sortools$Sgraph
-	$(COPY) ortools$Slinear_solver$S*.h $(TARGET_DIR)$Sinclude$Sortools$Slinear_solver
-	$(COPY) ortools$Slp_data$S*.h $(TARGET_DIR)$Sinclude$Sortools$Slp_data
-	$(COPY) ortools$Sgen$Sortools$Slinear_solver$S*.pb.h $(TARGET_DIR)$Sinclude$Sortools$Slinear_solver
-	$(COPY) ortools$Ssat$S*.h $(TARGET_DIR)$Sinclude$Sortools$Ssat
-	$(COPY) ortools$Sgen$Sortools$Ssat$S*.pb.h $(TARGET_DIR)$Sinclude$Sortools$Ssat
-	$(COPY) ortools$Sutil$S*.h $(TARGET_DIR)$Sinclude$Sortools$Sutil
+install_full_cc: install_cc install_deps_dirs
 ifeq ($(SYSTEM),win)
-	tools\tar.exe -cf - -C dependencies$Sinstall$Sinclude gflags | tools\tar.exe -xpf - -C $(TARGET_DIR)$Sinclude
-	tools\tar.exe -cf - -C dependencies$Sinstall$Sinclude glog | tools\tar.exe -xpf - -C $(TARGET_DIR)$Sinclude
-	tools\tar.exe -cf - -C dependencies$Sinstall$Sinclude google | tools\tar.exe -xpf - -C $(TARGET_DIR)$Sinclude
+	tools\tar.exe -cf - -C dependencies$Sinstall$Sinclude gflags | tools\tar.exe -xpf - -C "$(prefix)$Sinclude"
+	tools\tar.exe -cf - -C dependencies$Sinstall$Sinclude glog | tools\tar.exe -xpf - -C "$(prefix)$Sinclude"
+	tools\tar.exe -cf - -C dependencies$Sinstall$Sinclude google | tools\tar.exe -xpf - -C "$(prefix)$Sinclude"
 else
-	tar -cf - -C dependencies$Sinstall$Sinclude gflags | tar -xpf - -C $(TARGET_DIR)$Sinclude
-	tar -cf - -C dependencies$Sinstall$Sinclude glog | tar -xpf - -C $(TARGET_DIR)$Sinclude
-	tar -cf - -C dependencies$Sinstall$Sinclude google | tar -xpf - -C $(TARGET_DIR)$Sinclude
+	tar -cf - -C dependencies$Sinstall$Sinclude gflags | tar -xpf - -C "$(prefix)$Sinclude"
+	tar -cf - -C dependencies$Sinstall$Sinclude glog | tar -xpf - -C "$(prefix)$Sinclude"
+	tar -cf - -C dependencies$Sinstall$Sinclude google | tar -xpf - -C "$(prefix)$Sinclude"
 endif
-	$(COPY) LICENSE-2.0.txt $(TARGET_DIR)
+	$(COPY) LICENSE-2.0.txt "$(prefix)"
 ifeq ($(PLATFORM),MACOSX)
-	$(COPY) tools/install_libortools_mac.sh $(TARGET_DIR)
-	chmod 775 $(TARGET_DIR)/install_libortools_mac.sh
-	cd $(TARGET_DIR) && ./install_libortools_mac.sh && rm install_libortools_mac.sh
+	$(COPY) tools/install_libortools_mac.sh "$(prefix)"
+	chmod 775 "$(prefix)/install_libortools_mac.sh"
+	cd "$(prefix)" && ./install_libortools_mac.sh && rm install_libortools_mac.sh
 endif