diff --git a/Makefile b/Makefile
index 3f8474873..01df46ce5 100644
--- a/Makefile
+++ b/Makefile
@@ -2,9 +2,11 @@
 default: bin/moby moby-initrd.img
 all: default
 
-GO_COMPILE=mobylinux/go-compile:3afebc59c5cde31024493c3f91e6102d584a30b9@sha256:e0786141ea7df8ba5735b63f2a24b4ade9eae5a02b0e04c4fca33b425ec69b0a
+VERSION="0.0" # dummy for now
+GIT_COMMIT=$(shell git rev-list -1 HEAD)
+
+GO_COMPILE=mobylinux/go-compile:a2ff853b00d687f845d0f67189fa645a567c006e@sha256:09fff8a5c022fc9ead35b2779209c043196b09193c6e61d98603d402c0971f03
 
-MOBY_DEPS=$(wildcard src/cmd/moby/*.go)
 GOOS=$(shell uname -s | tr '[:upper:]' '[:lower:]')
 GOARCH=amd64
 ifneq ($(GOOS),linux)
@@ -14,11 +16,13 @@ ifeq ($(GOOS),darwin)
 default: bin/infrakit-instance-hyperkit
 endif
 
+MOBY_DEPS=$(wildcard src/cmd/moby/*.go) Makefile vendor.conf
+MOBY_DEPS+=$(wildcard src/initrd/*.go) $(wildcard src/pad4/*.go)
 bin/moby: $(MOBY_DEPS) | bin
-	tar cf - vendor src/initrd src/pad4 -C src/cmd/moby . | docker run --rm --net=none --log-driver=none -i $(CROSS) $(GO_COMPILE) --package github.com/docker/moby -o $@ | tar xf -
+	tar cf - vendor src/initrd src/pad4 -C src/cmd/moby . | docker run --rm --net=none --log-driver=none -i $(CROSS) $(GO_COMPILE) --package github.com/docker/moby --ldflags "-X main.GitCommit=$(GIT_COMMIT) -X main.Version=$(VERSION)" -o $@ | tar xf -
 	touch $@
 
-MOBY_DEPS=$(wildcard src/cmd/infrakit-instance-hyperkit/*.go)
+INFRAKIT_DEPS=$(wildcard src/cmd/infrakit-instance-hyperkit/*.go) Makefile vendor.conf
 bin/infrakit-instance-hyperkit: $(INFRAKIT_DEPS) | bin
 	tar cf - vendor -C src/cmd/infrakit-instance-hyperkit . | docker run --rm --net=none --log-driver=none -i $(CROSS) $(GO_COMPILE) --package github.com/docker/moby -o $@ | tar xf -
 	touch $@
diff --git a/src/cmd/moby/build.go b/src/cmd/moby/build.go
index c029f5716..1c6efad6d 100644
--- a/src/cmd/moby/build.go
+++ b/src/cmd/moby/build.go
@@ -35,7 +35,7 @@ func build(args []string) {
 		os.Exit(1)
 	}
 	conf := remArgs[0]
-	if filepath.Ext(conf) == "" {
+	if !(filepath.Ext(conf) == ".yml" || filepath.Ext(conf) == ".yaml") {
 		conf = conf + ".yml"
 	}
 
diff --git a/src/cmd/moby/main.go b/src/cmd/moby/main.go
index 8496624bc..6ccf996a4 100644
--- a/src/cmd/moby/main.go
+++ b/src/cmd/moby/main.go
@@ -4,12 +4,19 @@ import (
 	"flag"
 	"fmt"
 	"os"
+	"path/filepath"
 
 	log "github.com/Sirupsen/logrus"
 )
 
 var (
 	defaultLogFormatter = &log.TextFormatter{}
+
+	// Version is the human-readable version
+	Version = "unknown"
+
+	// GitCommit hash, set at compile time
+	GitCommit = "unknown"
 )
 
 // infoFormatter overrides the default format for Info() log events to
@@ -24,15 +31,22 @@ func (f *infoFormatter) Format(entry *log.Entry) ([]byte, error) {
 	return defaultLogFormatter.Format(entry)
 }
 
+func version() {
+	fmt.Printf("%s version %s\n", filepath.Base(os.Args[0]), Version)
+	fmt.Printf("commit: %s\n", GitCommit)
+	os.Exit(0)
+}
+
 func main() {
 	flag.Usage = func() {
-		fmt.Printf("USAGE: %s [options] COMMAND\n\n", os.Args[0])
+		fmt.Printf("USAGE: %s [options] COMMAND\n\n", filepath.Base(os.Args[0]))
 		fmt.Printf("Commands:\n")
 		fmt.Printf("  build       Build a Moby image from a YAML file\n")
 		fmt.Printf("  run         Run a Moby image on a local hypervisor\n")
+		fmt.Printf("  version     Print version information\n")
 		fmt.Printf("  help        Print this message\n")
 		fmt.Printf("\n")
-		fmt.Printf("Run '%s COMMAND --help' for more information on the command\n", os.Args[0])
+		fmt.Printf("Run '%s COMMAND --help' for more information on the command\n", filepath.Base(os.Args[0]))
 		fmt.Printf("\n")
 		fmt.Printf("Options:\n")
 		flag.PrintDefaults()
@@ -69,6 +83,8 @@ func main() {
 		build(args[1:])
 	case "run":
 		run(args[1:])
+	case "version":
+		version()
 	case "help":
 		flag.Usage()
 	default:
diff --git a/tools/go-compile/compile.sh b/tools/go-compile/compile.sh
index e49fb5b7e..e5f6806ca 100755
--- a/tools/go-compile/compile.sh
+++ b/tools/go-compile/compile.sh
@@ -26,6 +26,10 @@ do
 		package="$2"
 		shift
 	;;
+	--ldflags)
+		ldflags="$2"
+		shift
+	;;
 	*)
 		echo "Unknown option $1"
 		exit 1
@@ -61,9 +65,14 @@ test -z $(find . -type f -name "*.go" -not -path "*/vendor/*" -not -name "*.pb.*
 
 if [ "$GOOS" = "darwin" ]
 then
-	go build -o $out "$package"
+	if [ -z "$ldflags" ]
+	then
+		go build -o $out "$package"
+	else
+		go build -o $out -ldflags "${ldflags}" "$package"
+	fi
 else
-	go build -o $out -buildmode pie --ldflags '-s -w -extldflags "-static"' "$package"
+	go build -o $out -buildmode pie -ldflags "-s -w ${ldflags} -extldflags \"-static\"" "$package"
 fi
 
 tar cf - $out