diff --git a/cmd/pkger/cmds/pack.go b/cmd/pkger/cmds/pack.go
index 7973e54..adf917e 100644
--- a/cmd/pkger/cmds/pack.go
+++ b/cmd/pkger/cmds/pack.go
@@ -30,6 +30,7 @@ const outName = "pkged.go"
 type packCmd struct {
 	*flag.FlagSet
 	out     string
+	tags    string
 	help    bool
 	include slice
 	subs    []command
@@ -53,7 +54,7 @@ func (e *packCmd) Exec(args []string) error {
 		return err
 	}
 
-	if err := Package(info, fp, decls); err != nil {
+	if err := Package(info, fp, decls, e.tags); err != nil {
 		return err
 	}
 
@@ -104,6 +105,7 @@ func New() (*packCmd, error) {
 	c.FlagSet = flag.NewFlagSet("pkger", flag.ExitOnError)
 	c.BoolVar(&c.help, "h", false, "prints help information")
 	c.StringVar(&c.out, "o", "", "output directory for pkged.go")
+	c.StringVar(&c.tags, "t", "", "conditional build tag(s) for pkged.go")
 	c.Var(&c.include, "include", "packages the specified file or directory")
 	c.Usage = func() {
 		fmt.Fprintf(os.Stderr, "Usage:\n\n")
@@ -123,7 +125,7 @@ func (e *packCmd) Flags() *flag.FlagSet {
 	return e.FlagSet
 }
 
-func Package(info here.Info, out string, decls parser.Decls) error {
+func Package(info here.Info, out string, decls parser.Decls, tags string) error {
 	c, err := here.Dir(filepath.Dir(out))
 	if err != nil {
 		return err
@@ -142,6 +144,9 @@ func Package(info here.Info, out string, decls parser.Decls) error {
 	}
 	defer f.Close()
 
+	if len(tags) > 0 {
+		fmt.Fprintf(f, "// +build %s\n\n", tags)
+	}
 	fmt.Fprintf(f, "// Code generated by pkger; DO NOT EDIT.\n\n")
 	fmt.Fprintf(f, "package %s\n\n", c.Name)
 	fmt.Fprintf(f, "import (\n\t\"github.com/markbates/pkger\"\n\t")