diff --git a/default.nix b/default.nix
index 0a0f3316..b48316b8 100644
--- a/default.nix
+++ b/default.nix
@@ -1,4 +1,6 @@
 {sources ? import ./npins}: {
+  # for repl sessions
+  inherit sources;
   lib = import (sources.nixpkgs + "/lib");
 
   nixosConfigurations = builtins.mapAttrs (_: import (sources.nixpkgs + "/nixos/lib/eval-config.nix")) {