From 7073c22ea0636787c77d9ad4f5b8f09feb072b3c Mon Sep 17 00:00:00 2001
From: iori <matsuhar@gmail.com>
Date: Sun, 13 Dec 2020 18:33:39 +0100
Subject: [PATCH] Override nixpkgs for stack

this make sure both ghc 8.10.1 and 8.10.2 are available for nixos
---
 README.md         | 4 ++--
 nixpkgs.nix       | 9 +++++++++
 stack-8.10.1.yaml | 3 ++-
 stack-8.10.2.yaml | 3 ++-
 4 files changed, 15 insertions(+), 4 deletions(-)
 create mode 100644 nixpkgs.nix

diff --git a/README.md b/README.md
index 50a210e..03ebebd 100644
--- a/README.md
+++ b/README.md
@@ -60,14 +60,14 @@ Then it needs to parse the hie files and recover any useful information.
 
 Build with:
 ```bash
-stack build izuna-builder --stack-yaml=stack-8.10.1.yaml
+stack build izuna-builder --stack-yaml=stack-8.10.1.yaml --no-nix
 ```
 
 izuna-server is a simple server that returns the processed hie files for the plugin.
 
 Build with:
 ```bash
-stack build izuna-server --stack-yaml=stack-8.10.1.yaml
+stack build izuna-server --stack-yaml=stack-8.10.1.yaml --no-nix
 ```
 
 ## Inspirations
diff --git a/nixpkgs.nix b/nixpkgs.nix
new file mode 100644
index 0000000..53b9524
--- /dev/null
+++ b/nixpkgs.nix
@@ -0,0 +1,9 @@
+let
+  rev = "2c0f6135aab77ff942b615228882c7dd996e0882";
+  extractedTarball = fetchTarball {
+    url = "https://github.com/NixOS/nixpkgs/archive/${rev}.tar.gz";
+    sha256 = "sha256:00yg8dck4ymcifrxsknnpms52n16xnb8yiqjkby002mbm2aflf45";
+  };
+in
+  # extractedTarball will be a directory here, and 'import' will automatically append /default.nix here
+import extractedTarball
diff --git a/stack-8.10.1.yaml b/stack-8.10.1.yaml
index 03ea64c..d703213 100644
--- a/stack-8.10.1.yaml
+++ b/stack-8.10.1.yaml
@@ -15,4 +15,5 @@ extra-deps:
 
 nix:
   enable: true
-  packages: [ zlib ]
\ No newline at end of file
+  packages: [ zlib ]
+  path: [nixpkgs=./nixpkgs.nix]
diff --git a/stack-8.10.2.yaml b/stack-8.10.2.yaml
index a42c84f..3257097 100644
--- a/stack-8.10.2.yaml
+++ b/stack-8.10.2.yaml
@@ -8,4 +8,5 @@ extra-deps:
 
 nix:
   enable: true
-  packages: [ zlib ]
\ No newline at end of file
+  packages: [ zlib ]
+  path: [nixpkgs=./nixpkgs.nix]