[Nix-dev] error "the argument named `ply' required by the function is missing"

[Peter Simons]

Hi,

the current trunk HEAD of nixpkgs is broken on my system:

  [simons at overkill nix-pkgs-current]$ nix-env --version
  nix-env (Nix) 0.13pre16130
  [simons at overkill nix-pkgs-current]$ nix-env --show-trace -u \*
  error: while evaluating the function at `/usr/local/src/nix-pkgs-current/pkgs/lib/meta.nix:41:16':
  while evaluating the function at `/usr/local/src/nix-pkgs-current/pkgs/lib/meta.nix:13:31':
  while evaluating the function at `/usr/local/src/nix-pkgs-current/pkgs/applications/networking/browsers/icecat-3/default.nix:1:2':
  the argument named `ply' required by the function is missing

Is anyone aware of a fix for this problem?

Take care,
Peter