From cff6c4fd908b0dd1bb0ad7159a62474b41e7ee7b Mon Sep 17 00:00:00 2001
From: Dominic Steinitz <dominic@steinitz.org>
Date: Tue, 3 Apr 2018 12:30:04 +0100
Subject: Specify which nixpkgs to use

---
 .circleci/config.yml | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

(limited to '.circleci')

diff --git a/.circleci/config.yml b/.circleci/config.yml
index 0071a65..7322a5f 100644
--- a/.circleci/config.yml
+++ b/.circleci/config.yml
@@ -9,7 +9,7 @@ jobs:
           key: stack-deps-{{ checksum "stack.yaml" }}
       - run:
           name: Install stack
-          command: nix-env -i stack
+          command: nix-env -f https://github.com/nixos/nixpkgs/archive/54ade273e7a677ec35e501174d86d253d9d8dede.tar.gz -i stack
       - run:
           name: Setup build toolchain
           command: stack --nix setup
-- 
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