diff --git a/SLS_Python/pyproject.toml b/SLS_Python/pyproject.toml
index 1e2b130..faba41c 100644
--- a/SLS_Python/pyproject.toml
+++ b/SLS_Python/pyproject.toml
@@ -1,4 +1,4 @@
-# Build this file using 'python -m build' (from 'build' package)
+# Build this file using 'python -m build --no-isolation'
 [build-system]
 requires = ["setuptools>=61.0", "wheel", "sls_build_backend"]
 build-backend = "sls_build_backend"
diff --git a/SLS_Python/sls_build_backend/build_hooks.py b/SLS_Python/sls_build_backend/build_hooks.py
index a39cb3d..399c3f8 100644
--- a/SLS_Python/sls_build_backend/build_hooks.py
+++ b/SLS_Python/sls_build_backend/build_hooks.py
@@ -1,15 +1,19 @@
 from setuptools.build_meta import build_wheel as _build_wheel
 from setuptools.build_meta import build_sdist as _build_sdist
+from .write_version import main, clean_output
 
 def _generate_version():
-    from .write_version import main
     main()
 
 def build_wheel(*args, **kwargs):
     _generate_version()
-    return _build_wheel(*args, **kwargs)
+    o = _build_wheel(*args, **kwargs)
+    clean_output()
+    return o
 
 
 def build_sdist(*args, **kwargs):
     _generate_version()
-    return _build_sdist(*args, **kwargs)
+    o = _build_sdist(*args, **kwargs)
+    clean_output()
+    return o
\ No newline at end of file
diff --git a/SLS_Python/sls_build_backend/write_version.py b/SLS_Python/sls_build_backend/write_version.py
index c0c8e8b..79cb061 100644
--- a/SLS_Python/sls_build_backend/write_version.py
+++ b/SLS_Python/sls_build_backend/write_version.py
@@ -27,6 +27,10 @@ def get_commit():
 def get_timestamp():
     return datetime.datetime.now(datetime.timezone.utc).isoformat() + "Z"
 
+def clean_output():
+    if output.exists():
+        output.unlink()
+
 def main():
     commit = get_commit()
     timestamp = get_timestamp()