diff --git a/src/expand.clj b/src/expand.clj
index 8db34bf..7c91693 100644
--- a/src/expand.clj
+++ b/src/expand.clj
@@ -256,7 +256,20 @@
   (-> "t.scm"
       slurp
       (scm/read-syntax :library? true)
-      expand-library)
+      expand-library
+      ;; :library/declarations
+      ;; second
+      ;; second
+      ;; scm/syntax->datum
+      (update :library/declarations
+              (fn [decls]
+                (for [decl decls]
+                  (match decl
+                    [:begin & xs] (->> xs
+                                       (map scm/syntax->datum)
+                                       (cons :begin)
+                                       vec)
+                    :else decl)))))
   (let [scopeholder (scm/new-scopeholder)
         env {[:global 'lambda] [:primitive 'lambda]}
         store-atom (atom {['lambda #{}] [:global 'lambda]})]
diff --git a/src/scm.clj b/src/scm.clj
index 574ee79..8b2d4a1 100644
--- a/src/scm.clj
+++ b/src/scm.clj
@@ -79,6 +79,18 @@
    (assert (not (syntax? datum)) "너는 이렇고 싶은가…")
    (->Syntax datum (syntax-context ctxt-donor))))
 
+(declare improper-list?)
+
+(defn syntax->datum [stx]
+  (cond (syntax? stx) (recur (syntax-e stx))
+        (seq? stx) (map syntax->datum stx)
+        (improper-list? stx) (throw (Exception. "todo"))
+        (or (constant? stx) (symbol? stx)) stx
+        :else (throw (ex-info
+                      nil
+                      {:stx stx}
+                      (IllegalArgumentException. "이것으로 할 것을 몰라")))))
+
 (defn rescope [stx ctxt-donor]
   (->Syntax (syntax-e stx) (syntax-context ctxt-donor)))