with (import (builtins.fetchGit {
  name = "nixpkgs-20.09";
  url = "git@github.com:nixos/nixpkgs.git";
  rev = "cd63096d6d887d689543a0b97743d28995bc9bc3";
  ref = "refs/tags/20.09";
}){});

mkShell {

  buildInputs = [
    nodePackages.typescript
    python3
    psmisc # fuser
  ];

}