diff --git a/artiq/devices/__init__.py b/artiq/devices/__init__.py new file mode 100644 index 000000000..e69de29bb diff --git a/artiq/language/__init__.py b/artiq/language/__init__.py new file mode 100644 index 000000000..e69de29bb diff --git a/artiq/sim/__init__.py b/artiq/sim/__init__.py new file mode 100644 index 000000000..e69de29bb