diff --git a/pipenv/core.py b/pipenv/core.py
index 5c51232b..e54ce80c 100644
--- a/pipenv/core.py
+++ b/pipenv/core.py
@@ -625,9 +625,9 @@ def ensure_project(three=None, python=None, validate=True, system=False, warn=Tr
             # Warn users if they are using the wrong version of Python.
             if project.required_python_version:
 
-                path_to_python = which('python')
+                path_to_python = which('python') or which('py')
 
-                if project.required_python_version not in (python_version(path_to_python) or ''):
+                if path_to_python and project.required_python_version not in (python_version(path_to_python) or ''):
                     click.echo(
                         '{0}: Your Pipfile requires {1} {2}, '
                         'but you are using {3} ({4}).'.format(
@@ -1767,7 +1767,7 @@ def do_install(
         except IOError:
             click.echo(
                 crayons.red(
-                   u'Unable to find requirements file at {0}.'.format(crayons.normal(requirements))
+                    u'Unable to find requirements file at {0}.'.format(crayons.normal(requirements))
                 ),
                 err=True
             )
diff --git a/pipenv/patched/piptools/resolver.py b/pipenv/patched/piptools/resolver.py
index d0aaa6e1..4e278018 100755
--- a/pipenv/patched/piptools/resolver.py
+++ b/pipenv/patched/piptools/resolver.py
@@ -307,6 +307,21 @@ class Resolver(object):
                                                ', '.join(sorted(dependency_strings, key=lambda s: s.lower())) or '-'))
         from pip._vendor.packaging.markers import InvalidMarker
         for dependency_string in dependency_strings:
+            individual_dependencies = [dep.strip() for dep in dependency_string.split(', ')]
+            cleaned_deps = []
+            for dep in individual_dependencies:
+                tokens = [token.strip() for token in dep.split(';')]
+                cleaned_tokens = []
+                markers = []
+                if len(tokens) == 1:
+                    cleaned_deps.append(tokens[0])
+                    continue
+                markers = list(set(tokens[1:]))
+                cleaned_tokens.append(tokens[0])
+                if markers:
+                    cleaned_tokens.extend(markers)
+                cleaned_deps.append('; '.join(cleaned_tokens))
+            dependency_string = ', '.join(set(cleaned_deps))
             yield InstallRequirement.from_line(dependency_string, constraint=ireq.constraint)