build:
  tags:
    - nix
  stage: build
  script:
    - nix-instantiate -I nixpkgs=https://github.com/hexchen/nixpkgs/archive/hexchen-20.09.tar.gz -A deploy.all
    - nix-build -A deploy.all -I nixpkgs=https://github.com/hexchen/nixpkgs/archive/hexchen-20.09.tar.gz