diff --git a/src/cmd/linuxkit/run_packet.go b/src/cmd/linuxkit/run_packet.go
index 3116ff3c7..3aa0eff45 100644
--- a/src/cmd/linuxkit/run_packet.go
+++ b/src/cmd/linuxkit/run_packet.go
@@ -5,6 +5,7 @@ import (
 	"encoding/json"
 	"flag"
 	"fmt"
+	"io/ioutil"
 	"net"
 	"net/http"
 	"os"
@@ -89,12 +90,22 @@ func runPacket(args []string) {
 	osType := "custom_ipxe"
 	billing := "hourly"
 
+	// Read kernel command line
+	var cmdline string
+	if c, err := ioutil.ReadFile(prefix + "-cmdline"); err != nil {
+		log.Fatalf("Cannot open cmdline file: %v", err)
+	} else {
+		cmdline = string(c)
+	}
+
 	// Build the iPXE script
-	// TODO(rn): Extract the kernel commandline from the file generated by moby build
+	// Note, we *append* the <prefix>-cmdline. iXPE booting will
+	// need the first set of "kernel-params" and we don't want to
+	// require these to be added to every YAML file.
 	userData := "#!ipxe\n\n"
 	userData += "dhcp\n"
 	userData += fmt.Sprintf("set base-url %s\n", url)
-	userData += "set kernel-params ip=dhcp nomodeset ro serial console=ttyS1,115200\n"
+	userData += fmt.Sprintf("set kernel-params ip=dhcp nomodeset ro serial console=ttyS1,115200 %s\n", cmdline)
 	userData += fmt.Sprintf("kernel ${base-url}/%s-kernel ${kernel-params}\n", name)
 	userData += fmt.Sprintf("initrd ${base-url}/%s-initrd.img\n", name)
 	userData += "boot"