diff --git a/Makefile b/Makefile
index a3d284a..1a49fa5 100644
--- a/Makefile
+++ b/Makefile
@@ -32,6 +32,11 @@ devel: venv pybinding wx
 	@$(INSIDE_VENV) pip install -e src/
 
 
+light: VENV_PATH = ./_venv
+light: venv
+	@$(INSIDE_VENV) pip install src/
+
+
 _build_wx/wxPython.target:
 	@$(INSIDE_VENV) echo "Building wxPython for your `python --version 2>&1` under Linux $(DISTRO_RELEASE)..."
 	# Create a folder to build wx into
diff --git a/src/msspec/utils.py b/src/msspec/utils.py
index 1dee866..38c289c 100644
--- a/src/msspec/utils.py
+++ b/src/msspec/utils.py
@@ -38,7 +38,11 @@ import ase.atom
 from ase import Atom
 from ase import Atoms
 
-from msspec.iodata import Data
+try:
+    from msspec.iodata import Data
+except ImportError as err:
+    print(err)
+
 from msspec.misc import LOGGER