From 4c0b1b7507866dc03edd193dd93edb5d55ac760e Mon Sep 17 00:00:00 2001
From: Vaibhav Sagar <vaibhavsagar@gmail.com>
Date: Mon, 6 Aug 2018 20:46:14 +0800
Subject: [PATCH] README.md: always specify -I with nix-build

---
 README.md | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/README.md b/README.md
index eefbf76a..fa611824 100644
--- a/README.md
+++ b/README.md
@@ -129,7 +129,7 @@ It might take a while the first time, but subsequent builds will be much faster.
 The IHaskell display modules are not loaded by default and have to be specified as additional packages:
 
 ```bash
-$ nix-build release.nix --arg packages "haskellPackages: [ haskellPackages.ihaskell-blaze haskellPackages.ihaskell-charts ]"
+$ nix-build -I nixpkgs=https://github.com/NixOS/nixpkgs-channels/archive/nixos-18.03.tar.gz release-8.2.nix --arg packages "haskellPackages: [ haskellPackages.ihaskell-blaze haskellPackages.ihaskell-charts ]"
 ```
 
 # Troubleshooting