Improve dependency links

issue7049

setup.py

@@ -56,7 +56,6 @@ requires.append(get_require_version('trytond'))
 tests_require = [get_require_version('proteus')]
 dependency_links = []
 if minor_version % 2:
-    # Add development index for testing with proteus
     dependency_links.append('https://trydevpi.tryton.org/')
 
 setup(name=name,

tox.ini

@@ -16,4 +16,4 @@ setenv =
     postgresql: DB_NAME={env:POSTGRESQL_NAME:test}
     mysql: DB_NAME={env:MYSQL_NAME:test}
 passenv=DPD_USER_ID DPD_PASSWORD
-install_command = pip install --pre --find-links https://trydevpi.tryton.org/ {opts} {packages}
+install_command = pip install --pre --process-dependency-links {opts} {packages}