overwrite configuration in vsphere post-processor broken

gistfile1.txt

2016/06/28 13:17:08 packer.exe: 2016/06/28 13:17:08 Starting ovftool with parameters: --noSSLVerify=true --acceptAllEulas --name="myname" --datastore="mydatastore" --diskMode="thin" --network="mynetwork" --vmFolder="myfolder" packer-rhel-7.2-x86_64-automation-base-vmware\rhel-7.2-x86_64-automation-base.vmx "vi://myusername:mypassword@myhost:443/mydatacenter/host/mycluster" --overwrite
==> vmware-iso: Running post-processor: vsphere
    vmware-iso (vsphere): Uploading packer-rhel-7.2-x86_64-automation-base-vmware\rhel-7.2-x86_64-automation-base.vmx to vSphere
    vmware-iso (vsphere): Uploading packer-rhel-7.2-x86_64-automation-base-vmware\rhel-7.2-x86_64-automation-base.vmx to vSphere
2016/06/28 13:17:08 Deleting original artifact for build 'vmware-iso'
2016/06/28 13:17:08 ui error: Build 'vmware-iso' errored: 1 error(s) occurred:
 
* Post-processor failed: Failed: exit status 1
Stdout: Error: Unexpected option: --overwrite
Completed with errors
Build 'vmware-iso' errored: 1 error(s) occurred:
 
* Post-processor failed: Failed: exit status 1
2016/06/28 13:17:08 Builds completed. Waiting on interrupt barrier...
2016/06/28 13:17:08 machine readable: error-count []string{"1"}
2016/06/28 13:17:08 ui error:
==> Some builds didn't complete successfully and had errors:
2016/06/28 13:17:08 machine readable: vmware-iso,error []string{"1 error(s) occurred:\n\n* Post-processor failed: Failed: exit status 1\nStdout: Er
ror: Unexpected option: --overwrite\r\nCompleted with errors\r\n"}
2016/06/28 13:17:08 ui error: --> vmware-iso: 1 error(s) occurred:
 
* Post-processor failed: Failed: exit status 1
Stdout: Error: Unexpected option: --overwrite
Completed with errors
2016/06/28 13:17:08 ui:
==> Builds finished but no artifacts were created.
2016/06/28 13:17:08 waiting for all plugin processes to complete...
Stdout: Error: Unexpected option: --overwrite
Completed with errors
 
 
==> Some builds didn't complete successfully and had errors:
--> vmware-iso: 1 error(s) occurred:
 
* Post-processor failed: Failed: exit status 1
Stdout: Error: Unexpected option: --overwrite
Completed with errors
 
 
==> Builds finished but no artifacts were created.