diff --git a/providers/os/os.go b/providers/os/os.go
index 060dc55..462472a 100644
--- a/providers/os/os.go
+++ b/providers/os/os.go
@@ -40,6 +40,8 @@ func (this *Provider) FuncMapFor (document *step.Document) template.FuncMap {
 		"appendFile":    stat.funcAppendFile,
 		"removeFile":    stat.funcRemoveFile,
 		"rename":        stat.funcRename,
+		"createDir":     stat.funcCreateDir,
+		"createDirAll":  stat.funcCreateDirAll,
 		// TODO: temporary files, dirs
 	}
 }
@@ -164,6 +166,18 @@ func (this *state) funcRename (name, newName string) error {
 	return os.Rename(name, newName)
 }
 
+func (this *state) funcCreateDir(name string) error {
+	name, err := this.document.Rel(name)
+	if err != nil { return err }
+	return os.Mkdir(name, 755)
+}
+
+func (this *state) funcCreateDirAll(name string) error {
+	name, err := this.document.Rel(name)
+	if err != nil { return err }
+	return os.MkdirAll(name, 755)
+}
+
 func sortDirEntriesByDate(entries []fs.DirEntry) {
 	sort.Slice(entries, func(left, right int) bool{
 		var leftTime time.Time