From bcb20c995bff737bc6d1a26cde3de32e5bbcb69c Mon Sep 17 00:00:00 2001
From: Nate Prewitt <Nate.Prewitt@gmail.com>
Date: Thu, 26 Jan 2017 12:57:28 -0700
Subject: [PATCH] update error message for missing SHELL variable

---
 pipenv/cli.py | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/pipenv/cli.py b/pipenv/cli.py
index 40f75ac8..73b0a817 100644
--- a/pipenv/cli.py
+++ b/pipenv/cli.py
@@ -690,7 +690,9 @@ def shell(three=None):
     try:
         shell = os.environ['SHELL']
     except KeyError:
-        click.echo(crayons.red('Windows is not currently supported.'))
+        error = ('No shell found: Please ensure the SHELL environment variable is set. '
+                 'Windows is not currently supported.')
+        click.echo(crayons.red(error))
         sys.exit(1)
 
     click.echo(crayons.yellow('Spawning environment shell ({0}).'.format(crayons.red(shell))))