From ed31333b05f67738f491d676c9926bf4aaa0c757 Mon Sep 17 00:00:00 2001
From: Guillaume Bouchard <guillaume.bouchard@tweag.io>
Date: Tue, 26 Jun 2018 23:49:42 +0200
Subject: [PATCH] Add a note in the readme about nixpkgs versions

---
 README.md | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/README.md b/README.md
index 1da5284..ac446e4 100644
--- a/README.md
+++ b/README.md
@@ -172,3 +172,11 @@ provides a similar system with a different approach:
 Both projects are now really similar and the only reason I did not
 contributed to `nix-install-vendor-gl.sh` was because initial `nixGL`
 had a totally different approach.
+
+# Troubleshooting
+
+If by any chance it does not work, you need to install nixGL using the same nixpkgs checkout than the one of your application. For example:
+
+```bash
+NIX_PATH=nixpkgs=https://github.com/nixos/nixpkgs/archive/94d80eb72474bf8243b841058ce45eac2b163943.tar.gz nix build -f ./default.nix nixGLIntel
+```