diff --git a/doc/changes/12530.md b/doc/changes/12530.md
new file mode 100644
index 00000000000..e16b065db57
--- /dev/null
+++ b/doc/changes/12530.md
@@ -0,0 +1,2 @@
+- `(include_subdirs qualified)`: Add missing alias dependency to module group.
+  (#12530, @anmonteiro)
diff --git a/src/dune_rules/modules.ml b/src/dune_rules/modules.ml
index c952c7abbf9..9055bcdf7c9 100644
--- a/src/dune_rules/modules.ml
+++ b/src/dune_rules/modules.ml
@@ -457,7 +457,7 @@ module Group = struct
           Module_name.Map.values g.modules |> List.concat_map ~f:closure_node
         in
         lib_interface :: closure
-      | _ -> [ lib_interface ]
+      | _ -> [ g.alias; lib_interface ]
 
     and closure_node = function
       | Module m -> [ m ]
diff --git a/test/blackbox-tests/test-cases/include-qualified/build-with-sandbox.t b/test/blackbox-tests/test-cases/include-qualified/build-with-sandbox.t
index 6a2651b9c70..9de11681893 100644
--- a/test/blackbox-tests/test-cases/include-qualified/build-with-sandbox.t
+++ b/test/blackbox-tests/test-cases/include-qualified/build-with-sandbox.t
@@ -42,10 +42,13 @@ Transitive deps file includes the alias module
   > let hello = "hello from sub"
   > EOF
 
-  $ DUNE_SANDBOX=none dune build
   $ DUNE_SANDBOX=symlink dune build
-  File "lib/bar.ml", line 1, characters 12-27:
-  1 | let hello = Sub.Hello.hello ^ Sub.world
-                  ^^^^^^^^^^^^^^^
-  Error: The module Sub.Hello is an alias for module Foo__Sub__.Hello, which is missing
-  [1]
+
+  $ cat _build/default/lib/.foo.objs/foo__Bar.impl.d
+  lib/bar.ml: Sub
+  $ cat _build/default/lib/.foo.objs/foo__Bar.impl.all-deps
+  foo__Sub
+  foo__Sub__
+  foo__Sub__Hello
+
+