diff --git a/gash/gash.scm b/gash/gash.scm
index cde0ccb..b2101c8 100644
--- a/gash/gash.scm
+++ b/gash/gash.scm
@@ -179,6 +179,7 @@ the GNU Public License, see COPYING for the copyleft.
     (('script term "&") (list (background (transform term))))
     (('script term) `(,(transform term)))
     (('script terms ...) (transform terms))
+    (('substitution "$(" (script) ")") (stderr "FOO: " (transform script)) (transform script))
     ((('term command)) `(,(transform command)))
     ((('term command) ...) (map transform command))
     ((('term command) (('term commands) ...)) (map transform (cons command commands)))
diff --git a/gash/peg.scm b/gash/peg.scm
index 591fb1f..5e77307 100644
--- a/gash/peg.scm
+++ b/gash/peg.scm
@@ -37,8 +37,7 @@
   (define-peg-pattern here-document all (and (+ (and (not-followed-by here-delim) peg-any)) here-delim))
 
   (define-peg-string-patterns
-    "script           <-- ws* (term (separator term)* separator?)? eof
-     eof              <   !. / error
+    "script           <-- ws* (term (separator term)* separator?)?
      error            <-- .*
      term             <-- pipeline (sp* ('&&' / '||') ws* pipeline)*
      pipeline         <-- '!'? sp* command (sp* pipe ws* command)*
diff --git a/test/substitution b/test/substitution
deleted file mode 100644
index 5c1f26d..0000000
--- a/test/substitution
+++ /dev/null
@@ -1 +0,0 @@
-echo "$(ls)"
diff --git a/todo/substitution b/todo/substitution
new file mode 100644
index 0000000..9c3f223
--- /dev/null
+++ b/todo/substitution
@@ -0,0 +1 @@
+echo $(find test -type f)