diff --git a/pipenv/patched/pip/__main__.py b/pipenv/patched/pip/__main__.py
index b424ab20..79d52838 100644
--- a/pipenv/patched/pip/__main__.py
+++ b/pipenv/patched/pip/__main__.py
@@ -28,6 +28,13 @@ if __name__ == "__main__":
     )
     import importlib.util
     import sys
+
+
+    SITE_PACKAGES_ROOT = os.path.dirname(os.path.dirname(os.path.dirname(os.path.dirname(__file__))))
+
+    # Inject site directory into system path.
+    sys.path.insert(-1, SITE_PACKAGES_ROOT)
+
     spec = importlib.util.spec_from_file_location(
         "pipenv", location=os.path.join(os.path.dirname(os.path.dirname(os.path.dirname(__file__))), "__init__.py"))
     pipenv = importlib.util.module_from_spec(spec)
diff --git a/pipenv/resolver.py b/pipenv/resolver.py
index 3fea0a1e..a0d9da29 100644
--- a/pipenv/resolver.py
+++ b/pipenv/resolver.py
@@ -6,6 +6,11 @@ import sys
 
 os.environ["PIP_PYTHON_PATH"] = str(sys.executable)
 
+SITE_PACKAGES_ROOT = os.path.dirname(os.path.dirname(__file__))
+
+# Inject site directory into system path.
+sys.path.insert(-1, SITE_PACKAGES_ROOT)
+
 
 def _ensure_modules():
     spec = importlib.util.spec_from_file_location(