uhofemei@toaster:/data/poky/build$ bitbake -s |grep docker
ERROR: ParseError at /data/poky/meta-virtualization/recipes-networking/netns/netns_git.bb:13: Could not inherit file classes/go.bbclass
ERROR: /data/poky/meta-virtualization/recipes-extended/libvirt/libvirt_1.3.5.bb: Error executing a python function in <code>:

The stack trace of python calls that resulted in this exception/failure was:
File: '<code>', lineno: 14, function: <module>
     0010:__anon_158__data_poky_meta_classes_siteinfo_bbclass(d)
     0011:__anon_70__data_poky_meta_classes_update_rc_d_bbclass(d)
     0012:__anon_67__data_poky_meta_classes_ptest_bbclass(d)
     0013:__anon_22__data_poky_meta_classes_systemd_bbclass(d)
 *** 0014:__anon_40__data_poky_meta_virtualization_recipes_extended_libvirt_libvirt_python_inc(d)
     0015:__anon_296__data_poky_meta_virtualization_recipes_extended_libvirt_libvirt_1_3_5_bb(d)
File: '/data/poky/meta-virtualization/recipes-extended/libvirt/libvirt-python.inc', lineno: 36, function: __anon_40__data_poky_meta_virtualization_recipes_extended_libvirt_libvirt_python_inc
     0032:    --install-data=${datadir}"
     0033:
     0034:python __anonymous () {
     0035:    pkgconfig = d.getVar('PACKAGECONFIG')
 *** 0036:    if ('python') in pkgconfig.split():
     0037:        d.setVar('LIBVIRT_PYTHON_ENABLE', '1')
     0038:    else:
     0039:        d.setVar('LIBVIRT_PYTHON_ENABLE', '0')
     0040:}
Exception: TypeError: getVar() missing 1 required positional argument: 'expand'


# POKY_BBLAYERS_CONF_VERSION is increased each time build/conf/bblayers.conf
# changes incompatibly
POKY_BBLAYERS_CONF_VERSION = "2"

BBPATH = "${TOPDIR}"
BBFILES ?= ""

BBLAYERS ?= " \
  /data/poky/meta \
  /data/poky/meta-openembedded/meta-oe \
  /data/poky/meta-openembedded/meta-networking \
  /data/poky/meta-openembedded/meta-filesystems \
  /data/poky/meta-openembedded/meta-python \
  /data/poky/meta-poky \
  /data/poky/meta-yocto-bsp \
  /data/poky/meta-snappy \
  /data/poky/meta-nodejs \
  /data/poky/meta-intel \
  /data/poky/meta-virtualization \