diff --git a/README.md b/README.md
index d2a6685..5858ff6 100644
--- a/README.md
+++ b/README.md
@@ -1458,6 +1458,14 @@ documentation](http://libguestfs.org/virt-sysprep.1.html#operations) for
 further details especially on default sysprep operations enabled for
 your system.
 
+Options to the virt-sysprep command call can be passed via
+`VAGRANT_LIBVIRT_VIRT_SYSPREP_OPTIONS` environment variable.
+
+```shell
+$ export VAGRANT_LIBVIRT_VIRT_SYSPREP_OPTIONS="--delete /etc/hostname"
+$ vagrant package
+```
+
 For example, on Chef [bento](https://github.com/chef/bento) VMs that
 require SSH hostkeys already set (e.g. bento/debian-7) as well as leave
 existing LVM UUIDs untouched (e.g. bento/ubuntu-18.04), these can be
diff --git a/lib/vagrant-libvirt/action/package_domain.rb b/lib/vagrant-libvirt/action/package_domain.rb
index c767fce..3027aad 100644
--- a/lib/vagrant-libvirt/action/package_domain.rb
+++ b/lib/vagrant-libvirt/action/package_domain.rb
@@ -38,8 +38,9 @@ module VagrantPlugins
           `qemu-img rebase -p -b "" #{@tmp_img}`
           # remove hw association with interface
           # working for centos with lvs default disks
+          options = ENV.fetch('VAGRANT_LIBVIRT_VIRT_SYSPREP_OPTIONS', '')
           operations = ENV.fetch('VAGRANT_LIBVIRT_VIRT_SYSPREP_OPERATIONS', 'defaults,-ssh-userdir')
-          `virt-sysprep --no-logfile --operations #{operations} -a #{@tmp_img}`
+          `virt-sysprep --no-logfile --operations #{operations} -a #{@tmp_img} #{options}`
           # add any user provided file
           extra = ''
           @tmp_include = @tmp_dir + '/_include'
diff --git a/lib/vagrant-libvirt/config.rb b/lib/vagrant-libvirt/config.rb
index 0661fa8..89feb92 100644
--- a/lib/vagrant-libvirt/config.rb
+++ b/lib/vagrant-libvirt/config.rb
@@ -355,7 +355,10 @@ module VagrantPlugins
           raise 'Feature name AND state must be specified'
         end
 
-        @features_hyperv = [{name: options[:name], state: options[:state]}]  if @features_hyperv == UNSET_VALUE
+        @features_hyperv = []  if @features_hyperv == UNSET_VALUE
+
+        @features_hyperv.push(name: options[:name],
+                              state: options[:state])
       end
 
       def cputopology(options = {})