Error

compressed.nix

{ system ? builtins.currentSystem
}:

let 
  reflex-platform   = import (import ./nixdeps/reflex-platform) {inherit system;};
  
  haskellLib        = pkgs.haskell.lib;
  inherit (reflex-platform) nixpkgs;
  inherit (nixpkgs) lib;

  pkgs = nixpkgs;

  monoReflexFun = (reflex-platform.project ({ pkgs, ... }: {
    packages = {
      frontend = ./landing-static;
    };

    shells = {
      ghcjs = ["frontend"];
    };

    overrides = self: super:
      let fast = p: haskellLib.dontHaddock (haskellLib.dontCheck p);
      in rec { frontend = fast super.frontend; };
  })).ghcjs.frontend;

  landingPage = monoReflexFun;

in {
  minified-landing  = landingPage;
}

error

building '/nix/store/znv8df9nmwaaypd2syaspa9g8kbih33l-cabal2nix-frontend.drv'...
installing
unpacking...
tar: This does not look like a tar archive
tar: Exiting with failure status due to previous errors
error: program 'tar' failed with exit code 2
error: unable to download '/nix/store/yr8xxzx8pqr87q7vjm2jia5c58wx1hi7-landing-static': URL using bad/illegal format or missing URL (3)
** need a revision for VCS when the hash is given. skipping.
** need a revision for VCS when the hash is given. skipping.
** need a revision for VCS when the hash is given. skipping.
** need a revision for VCS when the hash is given. skipping.
cabal2nix: user error (Failed to fetch source. Does this source exist? Source {sourceUrl = "/nix/store/yr8xxzx8pqr87q7vjm2jia5c58wx1hi7-landing-static", sourceRevision = "", sourceHash = Guess "", sourceCabalDir = ""})
builder for '/nix/store/znv8df9nmwaaypd2syaspa9g8kbih33l-cabal2nix-frontend.drv' failed with exit code 1
error: build of '/nix/store/znv8df9nmwaaypd2syaspa9g8kbih33l-cabal2nix-frontend.drv' failed
(use '--show-trace' to show detailed location information)