diff --git a/cmd/utils.go b/cmd/utils.go
index 1ce515a..96d48fa 100644
--- a/cmd/utils.go
+++ b/cmd/utils.go
@@ -78,6 +78,12 @@ func runVM(passthroughArg string, fn func(context.Context, *vm.VM, *vm.FileManag
 		os.Exit(1)
 	}
 
+	biosPath, err := store.CheckDownloadVMBIOS()
+	if err != nil {
+		slog.Error("Failed to check/download VM BIOS", "error", err)
+		os.Exit(1)
+	}
+
 	var passthroughConfig vm.PassthroughConfig
 
 	if passthroughArg != "" {
@@ -92,6 +98,7 @@ func runVM(passthroughArg string, fn func(context.Context, *vm.VM, *vm.FileManag
 		}},
 
 		MemoryAlloc: vmMemAllocFlag,
+		BIOSPath:    biosPath,
 
 		PassthroughConfig:        passthroughConfig,
 		ExtraPortForwardingRules: forwardPortsRules,
diff --git a/constants/arch.go b/constants/arch.go
deleted file mode 100644
index 9baf32f..0000000
--- a/constants/arch.go
+++ /dev/null
@@ -1,14 +0,0 @@
-package constants
-
-import "runtime"
-
-func GetUnixWorkArch() string {
-	arch := "x86_64"
-	if runtime.GOOS == "arm64" {
-		arch = "arm64"
-	}
-
-	// CPU architectures other than amd64 and arm64 are not yet natively supported.
-	// Running on a non-officially-supported arch will result in use of x86_64 VM.
-	return arch
-}
diff --git a/constants/image.go b/constants/image.go
index f312192..1cb9bb1 100644
--- a/constants/image.go
+++ b/constants/image.go
@@ -19,7 +19,7 @@ var alpineBaseImageHash []byte
 func init() {
 	baseAlpineArch = "x86_64"
 	alpineBaseImageHash = utils.MustDecodeHex("925f6bc1039a0abcd0548d2c3054d54dce31cfa03c7eeba22d10d85dc5817c98")
-	if runtime.GOOS == "arm64" {
+	if runtime.GOARCH == "arm64" {
 		baseAlpineArch = "aarch64"
 		alpineBaseImageHash = utils.MustDecodeHex("c94593729e4577650d9e73ada28e3cbe56964ab2a27240364f8616e920ed6d4e")
 	}
diff --git a/storage/storage.go b/storage/storage.go
index c0d7c41..cd34bfb 100644
--- a/storage/storage.go
+++ b/storage/storage.go
@@ -81,9 +81,9 @@ func (s *Storage) BuildVMImageWithInterruptHandler(showBuilderVMDisplay bool, ov
 		return errors.Wrap(err, "check/download base image")
 	}
 
-	biosPath, err := s.CheckDownloadCPUArchSpecifics()
+	biosPath, err := s.CheckDownloadVMBIOS()
 	if err != nil {
-		return errors.Wrap(err, "check/download cpu arch specifics")
+		return errors.Wrap(err, "check/download vm bios")
 	}
 
 	s.logger.Info("Building VM image", "tags", constants.GetAlpineBaseImageTags(), "overwriting", removed, "dst", vmImagePath)
@@ -116,7 +116,7 @@ func (s *Storage) DataDirPath() string {
 	return s.path
 }
 
-func (s *Storage) CheckDownloadCPUArchSpecifics() (string, error) {
+func (s *Storage) CheckDownloadVMBIOS() (string, error) {
 	if runtime.GOARCH == "arm64" {
 		p, err := s.CheckDownloadAarch64EFIImage()
 		if err != nil {
@@ -126,6 +126,8 @@ func (s *Storage) CheckDownloadCPUArchSpecifics() (string, error) {
 		return p, nil
 	}
 
+	// On x86_64, there is no requirement to supply QEMU with any BIOS images.
+
 	return "", nil
 }
 
diff --git a/vm/vm.go b/vm/vm.go
index 67714d0..7632e44 100644
--- a/vm/vm.go
+++ b/vm/vm.go
@@ -168,7 +168,13 @@ func NewVM(logger *slog.Logger, cfg VMConfig) (*VM, error) {
 			driveArgs += ",snapshot=on"
 		}
 
-		cmdArgs = append(cmdArgs, "-drive", driveArgs, "-device", "virtio-blk-pci,drive=disk"+fmt.Sprint(i)+",bootindex="+fmt.Sprint(i))
+		devArgs := "virtio-blk-pci,drive=disk" + fmt.Sprint(i)
+
+		if cfg.CdromImagePath == "" {
+			devArgs += ",bootindex=" + fmt.Sprint(i)
+		}
+
+		cmdArgs = append(cmdArgs, "-drive", driveArgs, "-device", devArgs)
 	}
 
 	if len(cfg.PassthroughConfig.USB) != 0 {