From 4d4185462ca343feb5eb2ca3f6f8599c74a2bcc0 Mon Sep 17 00:00:00 2001
From: Mike Pilgrem <mpilgrem@users.noreply.github.com>
Date: Fri, 19 Apr 2024 16:47:18 +0100
Subject: [PATCH] Re #6554 Limitation of `config set` commands with existing
 key

---
 doc/config_command.md | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/doc/config_command.md b/doc/config_command.md
index a5450c73c9..f61142f6f8 100644
--- a/doc/config_command.md
+++ b/doc/config_command.md
@@ -58,6 +58,11 @@ Available commands:
 The `stack config set` commands allow the values of keys in YAML configuration
 files to be set. See `stack config set` for the available keys.
 
+!!! note
+
+    The `config set` commands support an existing key only in the form
+    `key: value` on a single line.
+
 ## The `stack config set install-ghc` command
 
 ~~~text