diff --git a/news/3158.bugfix.rst b/news/3158.bugfix.rst
new file mode 100644
index 00000000..661fb09e
--- /dev/null
+++ b/news/3158.bugfix.rst
@@ -0,0 +1 @@
+Fix package installation when the virtual environment path contains parentheses.
diff --git a/pipenv/cmdparse.py b/pipenv/cmdparse.py
index 087a95b1..cec19273 100644
--- a/pipenv/cmdparse.py
+++ b/pipenv/cmdparse.py
@@ -1,3 +1,4 @@
+import itertools
 import re
 import shlex
 
@@ -8,6 +9,12 @@ class ScriptEmptyError(ValueError):
     pass
 
 
+def _quote_if_contains(value, pattern):
+    if next(re.finditer(pattern, value), None):
+        return '"{0}"'.format(re.sub(r'(\\*)"', r'\1\1\\"', value))
+    return value
+
+
 class Script(object):
     """Parse a script line (in Pipfile's [scripts] section).
 
@@ -56,17 +63,21 @@ class Script(object):
         The result is then quoted into a pair of double quotes to be grouped.
 
         An argument is intentionally not quoted if it does not contain
-        whitespaces. This is done to be compatible with Windows built-in
+        foul characters. This is done to be compatible with Windows built-in
         commands that don't work well with quotes, e.g. everything with `echo`,
         and DOS-style (forward slash) switches.
 
+        Foul characters include:
+
+        * Whitespaces.
+        * Parentheses in the command. (pypa/pipenv#3168)
+
         The intended use of this function is to pre-process an argument list
         before passing it into ``subprocess.Popen(..., shell=True)``.
 
         See also: https://docs.python.org/3/library/subprocess.html#converting-argument-sequence
         """
-        return " ".join(
-            arg if not next(re.finditer(r'\s', arg), None)
-            else '"{0}"'.format(re.sub(r'(\\*)"', r'\1\1\\"', arg))
-            for arg in self._parts
-        )
+        return " ".join(itertools.chain(
+            [_quote_if_contains(self.command, r'[\s()]')],
+            (_quote_if_contains(arg, r'\s') for arg in self.args),
+        ))
diff --git a/tests/unit/test_cmdparse.py b/tests/unit/test_cmdparse.py
index 06012d07..1b329a53 100644
--- a/tests/unit/test_cmdparse.py
+++ b/tests/unit/test_cmdparse.py
@@ -47,3 +47,20 @@ def test_cmdify_complex():
         '-c',
         """ "print(\'Double quote: \\\"\')" """.strip(),
     ]), script
+
+
+@pytest.mark.run
+@pytest.mark.script
+def test_cmdify_quote_if_paren_in_command():
+    """Ensure ONLY the command is quoted if it contains parentheses.
+    """
+    script = Script.parse(' '.join([
+        '"C:\\Python36(x86)\\python.exe"',
+        '-c',
+        "print(123)",
+    ]))
+    assert script.cmdify() == ' '.join([
+        '"C:\\Python36(x86)\\python.exe"',
+        '-c',
+        "print(123)",
+    ]), script