https://github.com/elixir-lang/elixir/pull/1407

diff --git a/Makefile b/Makefile
index 1e7fa98..82c40b5 100644
--- a/Makefile
+++ b/Makefile
@@ -3,7 +3,14 @@ ELIXIRC := bin/elixirc --ignore-module-conflict $(ELIXIRC_OPTS)
 ERLC := erlc -I lib/elixir/include
 ERL := erl -I lib/elixir/include -noshell -pa lib/elixir/ebin
 VERSION := $(strip $(shell cat VERSION))
-INSTALL_PATH := /usr/local
+Q := @
+PREFIX := /usr/local
+LIBDIR := lib
+INSTALL = install
+INSTALL_DIR = $(INSTALL) -m755 -d
+INSTALL_DATA = $(INSTALL) -m644
+INSTALL_PROGRAM = $(INSTALL) -m755
+
 
 .PHONY: install compile erlang elixir dialyze test clean docs release_docs release_zip release_erl
 .NOTPARALLEL: compile
@@ -14,15 +21,15 @@ define APP_TEMPLATE
 $(1): lib/$(1)/ebin/Elixir.$(2).beam lib/$(1)/ebin/$(1).app
 
 lib/$(1)/ebin/$(1).app:
-	@ cd lib/$(1) && ../../bin/elixir -e "Mix.Server.start_link(:dev)" -r mix.exs -e "Mix.Task.run('compile.app')"
+	$(Q) cd lib/$(1) && ../../bin/elixir -e "Mix.Server.start_link(:dev)" -r mix.exs -e "Mix.Task.run('compile.app')"
 
 lib/$(1)/ebin/Elixir.$(2).beam: $(wildcard lib/$(1)/lib/*.ex) $(wildcard lib/$(1)/lib/*/*.ex) $(wildcard lib/$(1)/lib/*/*/*.ex)
 	@ echo "==> $(1) (compile)"
-	@ $$(ELIXIRC) "lib/$(1)/lib/**/*.ex" -o lib/$(1)/ebin
+	$(Q) $$(ELIXIRC) "lib/$(1)/lib/**/*.ex" -o lib/$(1)/ebin
 
 test_$(1): $(1)
 	@ echo "==> $(1) (exunit)"
-	@ cd lib/$(1) && ../../bin/elixir -r "test/test_helper.exs" -pr "test/**/*_test.exs";
+	$(Q) cd lib/$(1) && ../../bin/elixir -r "test/test_helper.exs" -pr "test/**/*_test.exs";
 endef
 
 #==> Compilation tasks
@@ -35,11 +42,11 @@ default: compile
 compile: lib/elixir/src/elixir.app.src erlang elixir
 
 lib/elixir/src/elixir.app.src: src/elixir.app.src
-	@ rm -rf lib/elixir/src/elixir.app.src
-	@ cp src/elixir.app.src lib/elixir/src/elixir.app.src
+	$(Q) rm -rf lib/elixir/src/elixir.app.src
+	$(Q) cp src/elixir.app.src lib/elixir/src/elixir.app.src
 
 erlang:
-	@ cd lib/elixir && $(REBAR) compile
+	$(Q) cd lib/elixir && $(REBAR) compile
 
 # Since Mix depends on EEx and EEx depends on
 # Mix, we first compile EEx without the .app
@@ -48,21 +55,21 @@ elixir: kernel lib/eex/ebin/Elixir.EEx.beam mix ex_unit eex iex
 
 kernel: $(KERNEL) VERSION
 $(KERNEL): lib/elixir/lib/*.ex lib/elixir/lib/*/*.ex
-	@ if [ ! -f $(KERNEL) ]; then                       \
+	$(Q) if [ ! -f $(KERNEL) ]; then                       \
 		echo "==> bootstrap (compile)";                 \
 		$(ERL) -s elixir_compiler core -s erlang halt;  \
 	fi
 	@ echo "==> kernel (compile)";
-	@ $(ELIXIRC) "lib/elixir/lib/**/*.ex" -o lib/elixir/ebin;
-	@ $(MAKE) unicode
-	@ rm -rf lib/elixir/ebin/elixir.app
-	@ cd lib/elixir && $(REBAR) compile
+	$(Q) $(ELIXIRC) "lib/elixir/lib/**/*.ex" -o lib/elixir/ebin;
+	$(Q) $(MAKE) unicode
+	$(Q) rm -rf lib/elixir/ebin/elixir.app
+	$(Q) cd lib/elixir && $(REBAR) compile
 
 unicode: $(UNICODE)
 $(UNICODE): lib/elixir/priv/unicode.ex lib/elixir/priv/UnicodeData.txt lib/elixir/priv/NamedSequences.txt
 	@ echo "==> unicode (compile)";
 	@ echo "This step can take up to a minute to compile in order to embed the Unicode database"
-	@ $(ELIXIRC) lib/elixir/priv/unicode.ex -o lib/elixir/ebin;
+	$(Q) $(ELIXIRC) lib/elixir/priv/unicode.ex -o lib/elixir/ebin;
 
 $(eval $(call APP_TEMPLATE,ex_unit,ExUnit))
 $(eval $(call APP_TEMPLATE,eex,EEx))
@@ -72,16 +79,18 @@ $(eval $(call APP_TEMPLATE,iex,IEx))
 install: compile
 	@ echo "==> elixir (install)"
 	for dir in lib/*; do \
-		install -m755 -d $(INSTALL_PATH)/lib/elixir/$$dir/ebin; \
-		install -m644 $$dir/ebin/* $(INSTALL_PATH)/lib/elixir/$$dir/ebin; \
+		$(INSTALL_DIR) "$(DESTDIR)$(PREFIX)/$(LIBDIR)/elixir/$$dir/ebin"; \
+		$(INSTALL_DATA) $$dir/ebin/* "$(DESTDIR)$(PREFIX)/$(LIBDIR)/elixir/$$dir/ebin"; \
+	done
+	$(INSTALL_DIR) "$(DESTDIR)$(PREFIX)/$(LIBDIR)/elixir/bin"
+	$(INSTALL_PROGRAM) $(filter-out %.bat, $(wildcard bin/*)) "$(DESTDIR)$(PREFIX)/$(LIBDIR)/elixir/bin"
+	$(INSTALL_DIR) "$(DESTDIR)$(PREFIX)/bin"
+	for file in "$(DESTDIR)$(PREFIX)"/$(LIBDIR)/elixir/bin/* ; do \
+		ln -sf "../$(LIBDIR)/elixir/bin/$${file##*/}" "$(DESTDIR)$(PREFIX)/bin/" ; \
 	done
-	install -m755 -d $(INSTALL_PATH)/lib/elixir/bin
-	install -m755 $(filter-out %.bat, $(wildcard bin/*)) $(INSTALL_PATH)/lib/elixir/bin
-	install -m755 -d $(INSTALL_PATH)/bin
-	ln -sf $(INSTALL_PATH)/lib/elixir/bin/* $(INSTALL_PATH)/bin
 
 clean:
-	@ cd lib/elixir && $(REBAR) clean
+	$(Q) cd lib/elixir && $(REBAR) clean
 	rm -rf ebin
 	rm -rf lib/*/ebin
 	rm -rf lib/*/test/tmp
@@ -93,7 +102,7 @@ clean:
 	rm -rf lib/elixir/test/ebin
 
 clean_exbeam:
-	@ rm -f lib/*/ebin/Elixir.*.beam
+	$(Q) rm -f lib/*/ebin/Elixir.*.beam
 
 #==> Release tasks
 
@@ -120,8 +129,8 @@ release_docs: docs
 	mv docs ../elixir-lang.github.com/docs/master
 
 release_erl: compile
-	@ rm -rf rel/elixir
-	@ cd rel && ../rebar generate
+	$(Q) rm -rf rel/elixir
+	$(Q) cd rel && ../rebar generate
 
 #==> Tests tasks
 
@@ -129,29 +138,29 @@ test: test_erlang test_elixir
 
 test_erlang: compile
 	@ echo "==> elixir (eunit)"
-	@ mkdir -p lib/elixir/test/ebin
-	@ $(ERLC) -pa lib/elixir/ebin -o lib/elixir/test/ebin lib/elixir/test/erlang/*.erl
-	@ $(ERL) -pa lib/elixir/test/ebin -s test_helper test -s erlang halt;
+	$(Q) mkdir -p lib/elixir/test/ebin
+	$(Q) $(ERLC) -pa lib/elixir/ebin -o lib/elixir/test/ebin lib/elixir/test/erlang/*.erl
+	$(Q) $(ERL) -pa lib/elixir/test/ebin -s test_helper test -s erlang halt;
 	@ echo
 
 test_elixir: test_kernel test_ex_unit test_doc_test test_mix test_eex test_iex
 
 test_doc_test: compile
 	@ echo "==> doctest (exunit)"
-	@ cd lib/elixir && ../../bin/elixir -r "test/doc_test.exs";
+	$(Q) cd lib/elixir && ../../bin/elixir -r "test/doc_test.exs";
 
 test_kernel: compile
 	@ echo "==> kernel (exunit)"
-	@ cd lib/elixir && ../../bin/elixir -r "test/elixir/test_helper.exs" -pr "test/elixir/**/*_test.exs";
+	$(Q) cd lib/elixir && ../../bin/elixir -r "test/elixir/test_helper.exs" -pr "test/elixir/**/*_test.exs";
 
 .dialyzer.base_plt:
 	@ echo "==> Adding Erlang/OTP basic applications to a new base PLT"
-	@ dialyzer --output_plt .dialyzer.base_plt --build_plt --apps erts kernel stdlib compiler syntax_tools inets crypto ssl
+	$(Q) dialyzer --output_plt .dialyzer.base_plt --build_plt --apps erts kernel stdlib compiler syntax_tools inets crypto ssl
 
 dialyze: .dialyzer.base_plt
-	@ rm -f .dialyzer_plt
-	@ cp .dialyzer.base_plt .dialyzer_plt
+	$(Q) rm -f .dialyzer_plt
+	$(Q) cp .dialyzer.base_plt .dialyzer_plt
 	@ echo "==> Adding Elixir to PLT..."
-	@ dialyzer --plt .dialyzer_plt --add_to_plt -r lib/elixir/ebin lib/ex_unit/ebin lib/mix/ebin lib/iex/ebin lib/eex/ebin
+	$(Q) dialyzer --plt .dialyzer_plt --add_to_plt -r lib/elixir/ebin lib/ex_unit/ebin lib/mix/ebin lib/iex/ebin lib/eex/ebin
 	@ echo "==> Dialyzing Elixir..."
-	@ dialyzer --plt .dialyzer_plt -r lib/elixir/ebin lib/ex_unit/ebin lib/mix/ebin lib/iex/ebin lib/eex/ebin
+	$(Q) dialyzer --plt .dialyzer_plt -r lib/elixir/ebin lib/ex_unit/ebin lib/mix/ebin lib/iex/ebin lib/eex/ebin