diff --git a/.github/workflows/audit.yml b/.github/workflows/audit.yml
index 7c301dd..a56f194 100644
--- a/.github/workflows/audit.yml
+++ b/.github/workflows/audit.yml
@@ -14,9 +14,13 @@ jobs:
       - uses: actions/checkout@v3
       - name: install
         run: |
-          python -m venv env/
-          source env/bin/activate
-          python -m pip install -r requirements.txt
+          python -m venv env
+          # Upgrade wheel & setuptools first
+          env/bin/python -m pip install --upgrade wheel setuptools
+          # Install patched pip from GitHub commit to fix tarfile vulnerability
+          env/bin/python -m pip install "git+https://github.com/pypa/pip@f2b9231"
+          # Install project dependencies
+          env/bin/python -m pip install -r requirements.txt
       - uses: pypa/gh-action-pip-audit@v1.0.7
         with:
           virtual-environment: env/
diff --git a/mario/hyper_utils.py b/mario/hyper_utils.py
index 708a81e..47f5ba2 100644
--- a/mario/hyper_utils.py
+++ b/mario/hyper_utils.py
@@ -294,11 +294,16 @@ def save_hyper_as_csv(hyper_file: str, file_path: str, **kwargs):
     options = CsvOptions(**kwargs)
 
     with tempfile.TemporaryDirectory() as temp_dir:
-        temp_hyper = os.path.join(temp_dir, 'temp.hyper')
-        shutil.copyfile(
-            src=hyper_file,
-            dst=temp_hyper
-        )
+        if options.do_not_modify_source:
+            logging.info('Copy the source hyper file into the temp directory.')
+            temp_hyper = os.path.join(temp_dir, 'temp.hyper')
+            shutil.copyfile(
+                src=hyper_file,
+                dst=temp_hyper
+            )
+        else:
+            logging.info('Use the source hyper file directly without creating a temp copy.')
+            temp_hyper = hyper_file
 
         schema, table = get_default_table_and_schema(temp_hyper)
 
diff --git a/mario/options.py b/mario/options.py
index 7d06c6f..97703dc 100644
--- a/mario/options.py
+++ b/mario/options.py
@@ -27,6 +27,7 @@ class CsvOptions(OutputOptions):
     def __init__(self, **kwargs):
         super().__init__(**kwargs)
         self.compress_using_gzip = kwargs.get('compress_using_gzip', False)
+        self.do_not_modify_source = kwargs.get('do_not_modify_source', True)
 
 
 class HyperOptions(OutputOptions):
diff --git a/test/test_data_extractor.py b/test/test_data_extractor.py
index d41870f..01acd93 100644
--- a/test/test_data_extractor.py
+++ b/test/test_data_extractor.py
@@ -558,6 +558,38 @@ def test_hyper_to_csv():
     df = pd.read_csv(output_file)
     assert round(df['Sales'].sum(), 4) == 2326534.3543
 
+def test_hyper_to_csv_without_copy_to_tmp():
+    dataset = dataset_from_json(os.path.join('test', 'dataset.json'))
+    dataset.measures = []
+    metadata = metadata_from_json(os.path.join('test', 'metadata.json'))
+    # Copy the source data to avoid overwriting during other pytest runs
+    shutil.copyfile(
+        src=os.path.join('test', 'orders.hyper'),
+        dst=os.path.join('test', 'orders_copy.hyper')
+    )
+    configuration = Configuration(
+        file_path=os.path.join('test', 'orders_copy.hyper')
+    )
+    extractor = HyperFile(
+        dataset_specification=dataset,
+        metadata=metadata,
+        configuration=configuration
+    )
+    output_folder = os.path.join('output', 'test_hyper_to_csv')
+    os.makedirs(output_folder, exist_ok=True)
+    output_file = os.path.join(output_folder, 'orders_without_temp.csv')
+    extractor.save_data_as_csv(
+        file_path=output_file,
+        minimise=False,
+        compress_using_gzip=False,
+        do_not_modify_source=False
+    )
+    assert extractor.get_total() == 10194
+    assert extractor.get_total(measure='Sales') == 2326534.3542999607
+
+    df = pd.read_csv(output_file)
+    assert round(df['Sales'].sum(), 4) == 2326534.3543
+
 
 def test_partitioning_extractor_partition_sql_no_data_in_partition():
     # Skip this test if we don't have a connection string