diff --git a/justfile b/justfile
index 4bae512dbe82e01da916ddec16f160108d533234..f4bb303a25660b4b71aee66b5b97d497488f14b5 100644
--- a/justfile
+++ b/justfile
@@ -1,4 +1,4 @@
-set shell := ["pwsh", "-c"]
+set windows-shell := ["pwsh", "-c"]
 
 lock:
     @poetry lock --no-update
diff --git a/mitm_tooling/extraction/__init__.py b/mitm_tooling/extraction/__init__.py
index 932d0a6d9fc9f5b166b21f081b9ec741ca1fc5ed..7549233f6b3fb31f373f2187843aabf38f152b18 100644
--- a/mitm_tooling/extraction/__init__.py
+++ b/mitm_tooling/extraction/__init__.py
@@ -1,4 +1,3 @@
 from . import sql
-from transformation import df
 
-__all__ = ['sql', 'df']
\ No newline at end of file
+__all__ = ['sql']
\ No newline at end of file
diff --git a/mitm_tooling/representation/intermediate_representation.py b/mitm_tooling/representation/intermediate_representation.py
index 54c58d41fa7befa69fcdb9ef4fb9e80e7dab15ba..a30bbec79246aa537e17db1fdd6bf0f1f751bea2 100644
--- a/mitm_tooling/representation/intermediate_representation.py
+++ b/mitm_tooling/representation/intermediate_representation.py
@@ -8,13 +8,12 @@ from typing import TYPE_CHECKING, Self, Any, Annotated
 
 import pandas as pd
 import pydantic
-from numba.np.npdatetime_helpers import combine_datetime_timedelta_units
 from pydantic import ConfigDict
 
 from mitm_tooling.definition import get_mitm_def
 from mitm_tooling.data_types.data_types import MITMDataType
 from mitm_tooling.definition.definition_representation import ConceptName, MITM
-from utilities.python_utils import take_first
+from mitm_tooling.utilities.python_utils import take_first
 
 from .common import guess_k_of_header_df, mk_header_file_columns