diff --git a/shell.nix b/shell.nix
index a2f91ea..802184a 100644
--- a/shell.nix
+++ b/shell.nix
@@ -1,4 +1,4 @@
-{ channel ? "nixos-unstable" }@args:
+{ nixpkgs ? <nixpkgs> }@args:
 with import ./. args;
 mkShell {
   buildInputs = [