Ansible playbook to build nix on FreeBSD

nixbuild.yml

---
- hosts:
  - nixhost

  tasks:
    - name: Ensure dependency packages are installed
      pkgng:
        name: "{{item}}"
        state: present
      with_items:
      - sudo
      - curl
      - perl5
      - openssl
      - bash
      - pkgconf
      - sqlite3
      - gmake
      - autoconf
      - automake
      - git
      - libxslt
      - docbook-xsl-ns
      - bison
      - p5-DBI
      - p5-DBD-SQLite
      - p5-WWW-Curl
      - gtar
    - name: fetch nix sources
      git:
        repo: "https://github.com/manueljacob/nix"
        version: "freebsd-build-fixes"
        dest: "/home/nixbuild/nix"
        accept_hostkey: yes
      sudo_user: nixbuild
    - name: bootstrap checkout
      command: bash bootstrap.sh
      args:
        chdir: "/home/nixbuild/nix"
        creates: "/home/nixbuild/nix/configure"
      sudo_user: nixbuild
    - name: configure checkout
      command: bash configure
      args:
        chdir: "/home/nixbuild/nix"
        creates: "/home/nixbuild/nix/config.status"
      sudo_user: nixbuild
    - name: build nix
      command: gmake
      args:
        chdir: "/home/nixbuild/nix"
        creates: "/home/nixbuild/nix/scripts/nix-build"
      sudo_user: nixbuild
    - name: install nix
      command: gmake install
      args:
        chdir: "/home/nixbuild/nix"
        creates: "/usr/local/bin/nix-build"
    - name: create group
      group:
        name: nixbld
    - name: create nixbld users
      user:
        name: "{{item}}"
        groups: nixbld
      with_items:
        - nxbld1
        - nxbld2
      tags: foo

This is what I get when I try to run this:

$ ansible-playbook -c local ./nixbuild.yml -vvvv
No config file found; using defaults
 [WARNING]: provided hosts list is empty, only localhost is available

[DEPRECATION WARNING]: Instead of sudo/sudo_user, use become/become_user and make sure become_method is 'sudo' (default). This feature will be removed in a 
future release. Deprecation warnings can be disabled by setting deprecation_warnings=False in ansible.cfg.
1 plays in ./nixbuild.yml
Loaded callback default of type stdout, v2.0

PLAY ***************************************************************************

TASK [setup] *******************************************************************
ESTABLISH LOCAL CONNECTION FOR USER: janus
127.0.0.1 EXEC (umask 22 && mkdir -p "$(echo $HOME/.ansible/tmp/ansible-tmp-1446079308.87-42359250863945)" && echo "$(echo $HOME/.ansible/tmp/ansible-tmp-1446079308.87-42359250863945)")
127.0.0.1 PUT /tmp/tmpLs07gt TO /home/janus/.ansible/tmp/ansible-tmp-1446079308.87-42359250863945/setup
127.0.0.1 EXEC LANG=en_US.UTF-8 LC_ALL=en_US.UTF-8 LC_MESSAGES=en_US.UTF-8 /usr/local/bin/python /home/janus/.ansible/tmp/ansible-tmp-1446079308.87-42359250863945/setup; rm -rf "/home/janus/.ansible/tmp/ansible-tmp-1446079308.87-42359250863945/" > /dev/null 2>&1
ok: [localhost]

TASK [Ensure dependency packages are installed] ********************************
task path: /usr/home/janus/nixbuild.yml:6
ESTABLISH LOCAL CONNECTION FOR USER: janus
127.0.0.1 EXEC (umask 22 && mkdir -p "$(echo $HOME/.ansible/tmp/ansible-tmp-1446079311.43-37858262415666)" && echo "$(echo $HOME/.ansible/tmp/ansible-tmp-1446079311.43-37858262415666)")
127.0.0.1 PUT /tmp/tmpqoKt6M TO /home/janus/.ansible/tmp/ansible-tmp-1446079311.43-37858262415666/pkgng
127.0.0.1 EXEC LANG=en_US.UTF-8 LC_ALL=en_US.UTF-8 LC_MESSAGES=en_US.UTF-8 /usr/local/bin/python /home/janus/.ansible/tmp/ansible-tmp-1446079311.43-37858262415666/pkgng; rm -rf "/home/janus/.ansible/tmp/ansible-tmp-1446079311.43-37858262415666/" > /dev/null 2>&1
failed: [localhost] => (item=sudo,curl,perl5,openssl,bash,pkgconf,sqlite3,gmake,autoconf,automake,git,libxslt,docbook-xsl-ns,bison,p5-DBI,p5-DBD-SQLite,p5-WWW-Curl,gtar) => {"failed": true, "invocation": {"module_args": {"name": "sudo,curl,perl5,openssl,bash,pkgconf,sqlite3,gmake,autoconf,automake,git,libxslt,docbook-xsl-ns,bison,p5-DBI,p5-DBD-SQLite,p5-WWW-Curl,gtar", "state": "present"}, "module_name": "pkgng"}, "item": "sudo,curl,perl5,openssl,bash,pkgconf,sqlite3,gmake,autoconf,automake,git,libxslt,docbook-xsl-ns,bison,p5-DBI,p5-DBD-SQLite,p5-WWW-Curl,gtar", "msg": "Could not update catalogue"}

PLAY RECAP *********************************************************************
localhost                  : ok=1    changed=0    unreachable=0    failed=1