From 260b36e2725131139616fc4abbe48f916ab0da31 Mon Sep 17 00:00:00 2001
From: Tamara Dahlgren <35777542+tldahlgren@users.noreply.github.com>
Date: Sun, 20 Oct 2024 22:26:18 -0700
Subject: Docs: clarify include path options (#47083)

---
 lib/spack/docs/environments.rst | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/lib/spack/docs/environments.rst b/lib/spack/docs/environments.rst
index eec185eab8..2a9bb5c3f2 100644
--- a/lib/spack/docs/environments.rst
+++ b/lib/spack/docs/environments.rst
@@ -673,6 +673,9 @@ them to the environment.
 Environments can include files or URLs. File paths can be relative or
 absolute. URLs include the path to the text for individual files or
 can be the path to a directory containing configuration files.
+Spack supports ``file``, ``http``, ``https`` and ``ftp`` protocols (or
+schemes). Spack-specific, environment and user path variables may be
+used in these paths. See :ref:`config-file-variables` for more information.
 
 ^^^^^^^^^^^^^^^^^^^^^^^^
 Configuration precedence
-- 
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