Opraven nefunkční odkaz na stažení virtualenv

Makefile

@@ -1,6 +1,6 @@
 .PHONY: clean_env init_env clean_virtualenv install_packages clean install run all schema_seminar.pdf schema_all.pdf sync_test_media sync_test_db sync_test sync_local_media sync_local_db sync_local
 PYTHON=python2.7
-VE_VER=13.1.2
+VE_VER=16.0.0
 LOCAL_PYTHON=bin/python
 
 all: install
@@ -33,7 +33,9 @@ ${LOCAL_PYTHON}: virtualenv
 
 # directory name
 virtualenv:
-	curl -O https://pypi.python.org/packages/source/v/virtualenv/virtualenv-${VE_VER}.tar.gz 
+	# I could not find a link without hash anymore. This will probably break in
+	# the future.
+	curl -O https://files.pythonhosted.org/packages/33/bc/fa0b5347139cd9564f0d44ebd2b147ac97c36b2403943dbee8a25fd74012/virtualenv-16.0.0.tar.gz
 	tar xvfz virtualenv-${VE_VER}.tar.gz
 	mv -T virtualenv-${VE_VER} virtualenv
 	rm virtualenv-${VE_VER}.tar.gz