Please refer
#1404

Original /host/machine.conf:

onie_version=master-201802221653.0.1-dirty
onie_vendor_id=31874
onie_build_machine=alphanetworks_snh60b0_640f
onie_machine_rev=0
onie_arch=x86_64
onie_build_platform=x86_64-alphanetworks_snh60b0_640f-r0
onie_config_version=1
onie_build_date="2018-02-22T16:53+0800"
onie_partition_type=gpt
onie_kernel_version=3.14.27
onie_firmware=bios
onie_switch_asic=bcm
onie_skip_ethmgmt_macs=no
onie_grub_image_name=grubx64.efi
onie_machine=alphanetworks_snh60b0_640f
onie_platform=x86_64-alphanetworks_snh60b0_640f-r0

Current /host/machine.conf:
onie_arch='x86_64'
onie_bin=''
onie_boot_reason='rescue'
onie_build_date='2018-01-23T19:05+0800'
onie_build_machine='alphanetworks_snh60b0_640f'
onie_cli_static_parms=''
onie_cli_static_url='sonic-broadcom.bin'
onie_config_version='1'
onie_dev='/dev/sda2'
onie_exec_url='sonic-broadcom.bin'
onie_firmware='bios'
onie_grub_image_name='grubx64.efi'
onie_initrd_tmp='/'
onie_installer='/var/tmp/installer'
onie_kernel_version='3.14.27'
onie_machine='alphanetworks_snh60b0_640f'
onie_machine_rev='0'
onie_partition_type='gpt'
onie_platform='x86_64-alphanetworks_snh60b0_640f-r0'
onie_root_dir='/mnt/onie-boot/onie'
onie_skip_ethmgmt_macs='no'
onie_switch_asic='bcm'
onie_vendor_id='31874'
onie_version='master-201801231905.0.1-dirty'

Please remove quote.

It cause path with more quotes for other APP in SONIC.