diff --git a/pipenv/environment.py b/pipenv/environment.py
index 9c13611e..bf4df591 100644
--- a/pipenv/environment.py
+++ b/pipenv/environment.py
@@ -177,7 +177,7 @@ class Environment(object):
     @property
     def python(self):
         """Path to the environment python"""
-        py = vistir.compat.Path(self.base_paths["scripts"]).joinpath("python").as_posix()
+        py = vistir.compat.Path(self.base_paths["scripts"]).joinpath("python").absolute().as_posix()
         if not py:
             return vistir.compat.Path(sys.executable).as_posix()
         return py
diff --git a/pipenv/project.py b/pipenv/project.py
index c71c40ea..af155cc6 100644
--- a/pipenv/project.py
+++ b/pipenv/project.py
@@ -17,10 +17,10 @@ import vistir
 
 from first import first
 
-import pipfile
-import pipfile.api
+from .vendor import pipfile
+from .vendor.pipfile import api as pipfile_api
 
-from cached_property import cached_property
+from .vendor.cached_property import cached_property
 
 from .cmdparse import Script
 from .environment import Environment
@@ -117,7 +117,8 @@ else:
         u"name": u"pypi",
     }
 
-pipfile.api.DEFAULT_SOURCE = DEFAULT_SOURCE
+pipfile_api.DEFAULT_SOURCE = DEFAULT_SOURCE
+pipfile.api = pipfile_api
 
 
 class SourceNotFound(KeyError):
diff --git a/pipenv/utils.py b/pipenv/utils.py
index 199e2b41..b1419474 100644
--- a/pipenv/utils.py
+++ b/pipenv/utils.py
@@ -26,8 +26,8 @@ from six.moves.urllib.parse import urlparse
 from vistir.compat import ResourceWarning, lru_cache
 from vistir.misc import fs_str
 
-import crayons
-import parse
+from .vendor import crayons
+from .vendor import parse
 
 from . import environments
 from .exceptions import PipenvUsageError
@@ -281,7 +281,7 @@ class Resolver(object):
     @staticmethod
     @lru_cache()
     def _get_pip_command():
-        from pip_shims.shims import Command
+        from .vendor.pip_shims.shims import Command
 
         class PipCommand(Command):
             """Needed for pip-tools."""
@@ -1373,7 +1373,7 @@ def temp_path():
 
 def load_path(python):
     from ._compat import Path
-    import delegator
+    from .vendor import delegator
     import json
     python = Path(python).as_posix()
     json_dump_commmand = '"import json, sys; print(json.dumps(sys.path));"'
@@ -1487,7 +1487,7 @@ def handle_remove_readonly(func, path, exc):
         warnings.warn(default_warning_message.format(path), ResourceWarning)
         return
 
-    raise
+    raise exc
 
 
 def escape_cmd(cmd):
@@ -1816,7 +1816,10 @@ def make_posix(path):
     """
     if not isinstance(path, six.string_types):
         raise TypeError("Expected a string for path, received {0!r}...".format(path))
+    starts_with_sep = path.startswith(os.path.sep)
     separated = normalize_path(path).split(os.path.sep)
     if isinstance(separated, (list, tuple)):
         path = posixpath.join(*separated)
+        if starts_with_sep:
+            path = "/{0}".format(path)
     return path