diff --git a/news/3912.doc.rst b/news/3912.doc.rst
new file mode 100644
index 00000000..24598d19
--- /dev/null
+++ b/news/3912.doc.rst
@@ -0,0 +1 @@
+Added a line describing potential issues in fancy extension.
diff --git a/pipenv/cli/command.py b/pipenv/cli/command.py
index 293822a8..9d3ce9bf 100644
--- a/pipenv/cli/command.py
+++ b/pipenv/cli/command.py
@@ -342,7 +342,8 @@ def lock(
     "--fancy",
     is_flag=True,
     default=False,
-    help="Run in shell in fancy mode (for elegantly configured shells).",
+    help="Run in shell in fancy mode. Make sure the shell have no path manipulating"
+         " scripts. Run $pipenv shell for issues with compatibility mode.",
 )
 @option(
     "--anyway",