diff --git a/pipenv/patched/piptools/repositories/pypi.py b/pipenv/patched/piptools/repositories/pypi.py
index e73cb2d030..c435be0753 100644
--- a/pipenv/patched/piptools/repositories/pypi.py
+++ b/pipenv/patched/piptools/repositories/pypi.py
@@ -266,6 +266,9 @@ def get_legacy_dependencies(self, ireq):
                     setup_requires = self.finder.get_extras_links(
                         dist.get_metadata_lines('requires.txt')
                     )
+                # HACK: Sometimes the InstallRequirement doesn't properly get
+                # these values set on it during the resolution process. It's
+                # difficult to pin down what is going wrong. This fixes things.
                 ireq.version = dist.version
                 ireq.project_name = dist.project_name
                 ireq.req = dist.as_requirement()
diff --git a/pipenv/utils.py b/pipenv/utils.py
index a8664ddcdd..27ce9d301d 100644
--- a/pipenv/utils.py
+++ b/pipenv/utils.py
@@ -247,8 +247,13 @@ class PipCommand(basecommand.Command):
         if ' -i ' in dep:
             dep, url = dep.split(' -i ')
         req = Requirement.from_line(dep)
+
+        # req.as_line() is theoratically the same as dep, but is guarenteed to
+        # be normalized. This is safer than passing in dep.
+        # TODO: Stop passing dep lines around; just use requirement objects.
         constraints.append(req.as_line())
         # extra_constraints = []
+
         if url:
             index_lookup[req.name] = project.get_source(url=url).get('name')
         if req.markers:
diff --git a/tasks/vendoring/__init__.py b/tasks/vendoring/__init__.py
index 9bd14deea3..4b64b818b6 100644
--- a/tasks/vendoring/__init__.py
+++ b/tasks/vendoring/__init__.py
@@ -468,7 +468,10 @@ def generate_patch(ctx, package_path, patch_description, base='HEAD'):
     pkg = Path(package_path)
     if len(pkg.parts) != 2 or pkg.parts[0] not in ('vendor', 'patched'):
         raise ValueError('example usage: generate-patch patched/pew some-description')
-    patch_fn = '{0}-{1}.patch'.format(pkg.parts[1], patch_description)
+    if patch_description:
+        patch_fn = '{0}-{1}.patch'.format(pkg.parts[1], patch_description)
+    else:
+        patch_fn = '{0}.patch'.format(pkg.parts[1])
     command = 'git diff {base} -p {root} > {out}'.format(
         base=base,
         root=Path('pipenv').joinpath(pkg),