diff --git a/docs/basics.rst b/docs/basics.rst
index ee2e6621..00f4c7d9 100644
--- a/docs/basics.rst
+++ b/docs/basics.rst
@@ -367,18 +367,18 @@ The only optional section is the ``@<branch_or_tag>`` section.  When using git o
 
 Note that it is **strongly recommended** that you install any version-controlled dependencies in editable mode, using ``pipenv install -e``, in order to ensure that dependency resolution can be performed with an up to date copy of the repository each time it is performed, and that it includes all known dependencies.
 
-Below is an example usage which installs the git repository located at ``https://github.com/requests/requests.git`` from tag ``v2.19.1`` as package name ``requests``::
+Below is an example usage which installs the git repository located at ``https://github.com/requests/requests.git`` from tag ``v2.20.1`` as package name ``requests``::
 
-    $ pipenv install -e git+https://github.com/requests/requests.git@v2.19#egg=requests
+    $ pipenv install -e git+https://github.com/requests/requests.git@v2.20.1#egg=requests
     Creating a Pipfile for this project...
-    Installing -e git+https://github.com/requests/requests.git@v2.19.1#egg=requests...
+    Installing -e git+https://github.com/requests/requests.git@v2.20.1#egg=requests...
     [...snipped...]
-    Adding -e git+https://github.com/requests/requests.git@v2.19.1#egg=requests to Pipfile's [packages]...
+    Adding -e git+https://github.com/requests/requests.git@v2.20.1#egg=requests to Pipfile's [packages]...
     [...]
 
     $ cat Pipfile
     [packages]
-    requests = {git = "https://github.com/requests/requests.git", editable = true, ref = "2.19.1"}
+    requests = {git = "https://github.com/requests/requests.git", editable = true, ref = "v2.20.1"}
 
 Valid values for ``<vcs_type>`` include ``git``, ``bzr``, ``svn``, and ``hg``.  Valid values for ``<scheme>`` include ``http``, ``https``, ``ssh``, and ``file``.  In specific cases you also have access to other schemes: ``svn`` may be combined with ``svn`` as a scheme, and ``bzr`` can be combined with ``sftp`` and ``lp``.
 
diff --git a/news/3222.bugfix.rst b/news/3222.bugfix.rst
new file mode 100644
index 00000000..2f71f552
--- /dev/null
+++ b/news/3222.bugfix.rst
@@ -0,0 +1 @@
+Pipenv will no longer disable user-mode installation when the ``--system`` flag is passed in.
diff --git a/pipenv/core.py b/pipenv/core.py
index 28d5f9a8..7624db8b 100644
--- a/pipenv/core.py
+++ b/pipenv/core.py
@@ -725,7 +725,8 @@ def batch_install(deps_list, procs, failed_deps_queue,
                 extra_indexes = indexes[1:]
 
         with vistir.contextmanagers.temp_environ():
-            os.environ["PIP_USER"] = vistir.compat.fs_str("0")
+            if not allow_global:
+                os.environ["PIP_USER"] = vistir.compat.fs_str("0")
             c = pip_install(
                 dep,
                 ignore_hashes=any([ignore_hashes, dep.editable, dep.is_vcs]),
@@ -1896,7 +1897,8 @@ def do_install(
             )
             # pip install:
             with vistir.contextmanagers.temp_environ(), create_spinner("Installing...") as sp:
-                os.environ["PIP_USER"] = vistir.compat.fs_str("0")
+                if not system:
+                    os.environ["PIP_USER"] = vistir.compat.fs_str("0")
                 try:
                     pkg_requirement = Requirement.from_line(pkg_line)
                 except ValueError as e:
diff --git a/pipenv/project.py b/pipenv/project.py
index 334782d9..f3a11f69 100644
--- a/pipenv/project.py
+++ b/pipenv/project.py
@@ -728,6 +728,18 @@ class Project(object):
             data[u"requires"] = {"python_version": version[: len("2.7")]}
         self.write_toml(data)
 
+    @classmethod
+    def populate_source(cls, source):
+        """Derive missing values of source from the existing fields."""
+        # Only URL pararemter is mandatory, let the KeyError be thrown.
+        if "name" not in source:
+            source["name"] = get_url_name(source["url"])
+        if "verify_ssl" not in source:
+            source["verify_ssl"] = "https://" in source["url"]
+        if not isinstance(source["verify_ssl"], bool):
+            source["verify_ssl"] = source["verify_ssl"].lower() == "true"
+        return source
+
     def get_or_create_lockfile(self):
         from pipenv.vendor.requirementslib.models.lockfile import Lockfile as Req_Lockfile
         lockfile = None
@@ -748,15 +760,7 @@ class Project(object):
             elif not isinstance(sources, list):
                 sources = [sources,]
             lockfile_dict["_meta"]["sources"] = [
-                {
-                    "name": s.get("name", get_url_name(s.get("url"))),
-                    "url": s["url"],
-                    "verify_ssl": (
-                        s["verify_ssl"] if isinstance(s["verify_ssl"], bool) else (
-                            True if s["verify_ssl"].lower() == "true" else False
-                        )
-                    )
-                } for s in sources
+                self.populate_source(s) for s in sources
             ]
             _created_lockfile = Req_Lockfile.from_data(
                 path=self.lockfile_location, data=lockfile_dict, meta_from_project=False
diff --git a/tests/integration/test_lock.py b/tests/integration/test_lock.py
index 2b520808..f2f0ac76 100644
--- a/tests/integration/test_lock.py
+++ b/tests/integration/test_lock.py
@@ -486,3 +486,20 @@ def test_lockfile_with_empty_dict(PipenvInstance):
         assert c.return_code == 0
         assert 'Pipfile.lock is corrupted' in c.err
         assert p.lockfile['_meta']
+
+
+@pytest.mark.lock
+@pytest.mark.install
+def test_lock_with_incomplete_source(PipenvInstance, pypi):
+    with PipenvInstance(pypi=pypi, chdir=True) as p:
+        with open(p.pipfile_path, 'w') as f:
+            f.write("""
+[[source]]
+url = "https://test.pypi.org/simple"
+
+[packages]
+requests = "*"
+            """)
+        c = p.pipenv('install')
+        assert c.return_code == 0
+        assert p.lockfile['_meta']['sources']