diff --git a/windows/windows.pkr.hcl b/windows/windows.pkr.hcl
index 48c75ac9..49665ba1 100644
--- a/windows/windows.pkr.hcl
+++ b/windows/windows.pkr.hcl
@@ -3,7 +3,7 @@ variable "iso_path" {
   default = ""
 }
 
-source "qemu" "autogenerated_1" {
+source "qemu" "windows_builder" {
   accelerator      = "kvm"
   boot_command     = ["<wait2s><enter><wait>"]
   boot_wait        = "-1s"
@@ -19,6 +19,7 @@ source "qemu" "autogenerated_1" {
   iso_url          = "${var.iso_path}"
   machine_type     = "q35"
   memory           = "4096"
+  cpus             = "2"
   net_device       = "e1000"
   qemuargs         = [["-serial", "stdio"], ["-bios", "/usr/share/OVMF/OVMF_CODE.fd"]]
   shutdown_timeout = "45m"
@@ -26,10 +27,10 @@ source "qemu" "autogenerated_1" {
 }
 
 build {
-  sources = ["source.qemu.autogenerated_1"]
+  sources = ["source.qemu.windows_builder"]
 
   post-processor "shell-local" {
-    inline         = ["echo 'Syncing output-qemu/packer-qemu...'", "sync -f output-qemu/packer-qemu", "IMG_FMT=raw", "source scripts/setup-nbd", "TMP_DIR=$(mktemp -d /tmp/packer-maas-XXXX)", "echo 'Adding curtin-hooks to image...'", "mount -t ntfs $${nbd}p3 $TMP_DIR", "mkdir -p $TMP_DIR/curtin", "cp ./curtin/* $TMP_DIR/curtin/", "sync -f $TMP_DIR/curtin", "umount $TMP_DIR", "qemu-nbd -d $nbd", "rmdir $TMP_DIR"]
+    inline         = ["echo 'Syncing output-windows_builder/packer-windows_builder...'", "sync -f output-windows_builder/packer-windows_builder", "IMG_FMT=raw", "source scripts/setup-nbd", "TMP_DIR=$(mktemp -d /tmp/packer-maas-XXXX)", "echo 'Adding curtin-hooks to image...'", "mount -t ntfs $${nbd}p3 $TMP_DIR", "mkdir -p $TMP_DIR/curtin", "cp ./curtin/* $TMP_DIR/curtin/", "sync -f $TMP_DIR/curtin", "umount $TMP_DIR", "qemu-nbd -d $nbd", "rmdir $TMP_DIR"]
     inline_shebang = "/bin/bash -e"
   }
   post-processor "compress" {