From 396aed0ca760bc3073abee634d56d141525af1f0 Mon Sep 17 00:00:00 2001
From: Pjotr Prins
Date: Sat, 28 Aug 2021 09:09:17 +0200
Subject: Add explanation of using a guix profile

---
 README.md | 24 ++++++++++++++++++++++++
 1 file changed, 24 insertions(+)

diff --git a/README.md b/README.md
index c3a9848..66c780d 100644
--- a/README.md
+++ b/README.md
@@ -37,6 +37,30 @@ and try again.
 
 See also instructions in [.guix.scm](.guix.scm).
 
+#### Using a Guix profile (or rolling back)
+
+Create a new profile with
+
+```
+env GUIX_PACKAGE_PATH=~/guix-bioinformatics/ ~/.config/guix/current/bin/guix package -i genenetwork3 -p ~/opt/genenetwork3
+```
+
+and load the profile settings with
+
+```
+source ~/opt/genenetwork3/etc/profile
+start server...
+```
+
+Note that GN2 profiles include the GN3 profile (!). To roll genenetwork3 back you can use either in the same fashion (probably best to start a new shell first)
+
+```
+bash
+source ~/opt/genenetwork2-older-version/etc/profile
+set|grep store
+run tests, server etc...
+```
+
 #### Running Tests
 
 (assuming you are in a guix container; otherwise use venv!)
-- 
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