Default to nixpkgs-2009 for build.nix

hamishmack · hamishmack · commit fcc3a5785376 · 2021-06-23T03:42:00.000+12:00
diff --git a/build.nix b/build.nix
@@ -5,7 +5,7 @@
 let
   haskellNix = (import ./default.nix {});
 in
-{ nixpkgs ? haskellNix.sources.nixpkgs
+{ nixpkgs ? haskellNix.sources.nixpkgs-2009
 , nixpkgsArgs ? haskellNix.nixpkgsArgs
 , pkgs ? import nixpkgs nixpkgsArgs
 , ifdLevel ? 1000
