diff --git a/shell.nix b/shell.nix
index 1cfc587..af141a1 100644
--- a/shell.nix
+++ b/shell.nix
@@ -8,5 +8,6 @@ let
   pythonPackages = builtins.getAttr "python${pythonVersion}Packages" pkgs;
 in import ./default.nix {
   inherit src pythonPackages;
-  inherit (pkgs) stdenv fetchurl zip makeWrapper nix nix-prefetch-scripts;
+  inherit (pkgs) stdenv fetchurl zip makeWrapper nix
+    nix-prefetch-git nix-prefetch-hg;
 }