> <@atemu12:matrix.org> onny: untested but should work:
> ```Nix
> let
>   stable = import <nixpkgs> { };
>   unstable = import <nixpkgs-unstable> { };
> in
> {
>   libhandyStable = stable.libhandy;
>   libhandyUnstable = unstable.libhandy;
> }
> ```

Now I'm getting :(
`nix-env -f /home/onny/projects/nur-packages -iA mousai
replacing old 'mousai-0.2.0'
installing 'mousai-0.2.0'
error: file 'nixpkgs-unstable' was not found in the Nix search path (add it using $NIX_PATH or -I), at /home/onny/projects/nur-packages/pkgs/mousai/default.nix:26:21
(use '--show-trace' to show detailed location information)
`