fix #1745

pipenv/patched/notpip/index.py

@@ -488,7 +488,7 @@ class PackageFinder(object):
             dependency_versions
         )
 
-    def find_requirement(self, req, upgrade, ignore_compatibility=True):
+    def find_requirement(self, req, upgrade, ignore_compatibility=False):
         """Try to find a Link matching req
 
         Expects req, an InstallRequirement and upgrade, a boolean

pipenv/patched/piptools/repositories/pypi.py

@@ -40,7 +40,7 @@ class PyPIRepository(BaseRepository):
     config), but any other PyPI mirror can be used if index_urls is
     changed/configured on the Finder.
     """
-    def __init__(self, pip_options, session, use_json=True):
+    def __init__(self, pip_options, session, use_json=False):
         self.session = session
         self.use_json = use_json
 
@@ -218,6 +218,7 @@ class PyPIRepository(BaseRepository):
                                     ignore_installed=True,
                                     ignore_compatibility=False
                                     )
+
             result = reqset._prepare_file(self.finder, ireq, ignore_requires_python=True)
 
             # Convert setup_requires dict into a somewhat usable form.