diff --git a/default.nix b/default.nix
index 642c84a..901845d 100644
--- a/default.nix
+++ b/default.nix
@@ -3,4 +3,4 @@
 let
   sources = import ./nix/sources.nix;
   pkgs = import sources.nixpkgs { };
-in pkgs.callPackage ./site.nix { pkgs = pkgs; }
+in pkgs.callPackage ./site.nix { inherit pkgs; }
diff --git a/nix/sources.json b/nix/sources.json
index b939bc2..00661ab 100644
--- a/nix/sources.json
+++ b/nix/sources.json
@@ -12,15 +12,15 @@
         "url_template": "https://github.com/<owner>/<repo>/archive/<rev>.tar.gz"
     },
     "nixpkgs": {
-        "branch": "master",
-        "description": "Nix Packages collection",
-        "homepage": null,
+        "branch": "nixpkgs-unstable",
+        "description": "A read-only mirror of NixOS/nixpkgs tracking the released channels. Send issues and PRs to",
+        "homepage": "https://github.com/NixOS/nixpkgs",
         "owner": "NixOS",
-        "repo": "nixpkgs",
-        "rev": "48704fbd4fc4dc9660ab04f938048b4894ecb140",
-        "sha256": "1yghh74jw93air3jwljiyl79iypl9rgr4x4aag0f2jyq73vhzf8p",
+        "repo": "nixpkgs-channels",
+        "rev": "cc1ae9f21b9e0ce998e706a3de1bad0b5259f22d",
+        "sha256": "0zjafww05h50ncapw51b5qxgbv9prjyag0j22jnfc3kcs5xr4ap0",
         "type": "tarball",
-        "url": "https://github.com/NixOS/nixpkgs/archive/48704fbd4fc4dc9660ab04f938048b4894ecb140.tar.gz",
+        "url": "https://github.com/NixOS/nixpkgs-channels/archive/cc1ae9f21b9e0ce998e706a3de1bad0b5259f22d.tar.gz",
         "url_template": "https://github.com/<owner>/<repo>/archive/<rev>.tar.gz"
     },
     "vgo2nix": {
diff --git a/shell.nix b/shell.nix
index 1626e5b..8d6eacb 100644
--- a/shell.nix
+++ b/shell.nix
@@ -1,6 +1,7 @@
 let
   sources = import ./nix/sources.nix;
+  niv = (import sources.niv { }).niv;
   pkgs = import sources.nixpkgs { };
   xepkgs = import sources.xepkgs { };
   vgo2nix = import sources.vgo2nix { };
-in pkgs.mkShell { buildInputs = [ pkgs.go pkgs.niv xepkgs.gopls vgo2nix ]; }
+in pkgs.mkShell { buildInputs = [ pkgs.go xepkgs.gopls niv vgo2nix ]; }
diff --git a/site.nix b/site.nix
index 7062d9b..59996a8 100644
--- a/site.nix
+++ b/site.nix
@@ -1,4 +1,4 @@
-{ pkgs ? import <nixpkgs> {} }:
+{ pkgs ? import (import ./nix/sources.nix).nixpkgs }:
 with pkgs;
 
 assert lib.versionAtLeast go.version "1.13";
@@ -8,10 +8,9 @@ buildGoPackage rec {
   version = "latest";
   goPackagePath = "christine.website";
   src = ./.;
-  nativeBuildInputs = [ makeWrapper ];
-
   goDeps = ./deps.nix;
   allowGoReference = false;
+
   preBuild = ''
     export CGO_ENABLED=0
     buildFlagsArray+=(-pkgdir "$TMPDIR")