diff --git a/archetype/adapter.go b/archetype/adapter.go
index fb3171f..ad1f6fc 100644
--- a/archetype/adapter.go
+++ b/archetype/adapter.go
@@ -4,6 +4,7 @@ type Adapter interface {
 	Init(cfg *Config)
 	Name() string
   EditableSlugs() bool
+  BuildOptions() ([]string)
 	GetConfig(key string) (interface{}, error)
 	SetConfig(key string, value interface{}) error
 	ListPages() map[string]string
@@ -13,5 +14,5 @@ type Adapter interface {
 	CreatePage(slug, title, content string) error
 	SavePage(oldSlug, newSlug, title, content string) error
 	DeletePage(slug string) error
-	Build() (bool, string)
+	Build(buildOptions map[string]string) (bool, string)
 }
diff --git a/archetype/eureka.go b/archetype/eureka.go
index 133dd5b..51c16c2 100644
--- a/archetype/eureka.go
+++ b/archetype/eureka.go
@@ -31,6 +31,10 @@ func (self *EurekaAdapter) EditableSlugs() bool {
   return false
 }
 
+func (self *EurekaAdapter) BuildOptions() []string {
+  return []string{"twtxt"}
+}
+
 func (self *EurekaAdapter) GetConfig(key string) (interface{}, error) {
 	return nil, nil
 }
@@ -103,6 +107,6 @@ func (self *EurekaAdapter) DeletePage(slug string) error {
 	return nil
 }
 
-func (self *EurekaAdapter) Build() (bool, string) {
+func (self *EurekaAdapter) Build(buildOptions map[string]string) (bool, string) {
 	return true, "Build successful"
 }