# Revision history for distribution-nixpkgs

## 1.6.0

* `Distribution.Nixpkgs.PackageMap`
  * `readNixpkgPackageMap`: instead of a list of arguments to pass to
    `nix-env`, take path to nixpkgs and an optional nix expression
    to pass to it as arguments.
  * `readNixpkgPackageMap`: populate `PackageMap` with *all* attribute
    paths that point to derivations instead of just one per derivation.
    This fixes `resolve` not finding certain identifiers if there were
    two attributes pointing to the same derivation in nixpkgs. See also
    [#9](https://github.com/NixOS/distribution-nixpkgs/issues/9).