diff --git a/.gitignore b/.gitignore
index 4661efa..213924a 100644
--- a/.gitignore
+++ b/.gitignore
@@ -9,6 +9,7 @@ venv/
 venv*/
 pypi_release/wheelhouse/*.whl
 *__pycache__/
+pykingas/__pycache__/
 
 build/
 pykingas.egg-info/
diff --git a/pyproject.toml b/pyproject.toml
index 11c22f7..932a9c0 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -1,12 +1,16 @@
 [build-system]
-requires = ["scikit-build-core>=0.9.3", "setuptools"]
+requires = ["scikit-build-core"]
 build-backend = "scikit_build_core.build"
 
+[tool.scikit-build]
+sdist.include = ["libpykingas*"]
+sdist.exclude = ["tests/"]
+wheel.expand-macos-universal-tags = true
 
 [project]
 name = "pykingas"
 version = "2.0.0"
-description="Revised Enskog theory for Mie fluids, and other spherical potentials. Allows prediction of transport coefficients such as diffusion coefficients, viscosities, thermal diffusion coefficients and thermal conductivities. In dense, multicomponent gas mixtures and supercritical mixtures."
+description="Revised Enskog theory for Mie fluids, and other spherical potentials. Allows prediction of transport coefficients such as diffusion coefficients, viscosities, thermal diffusion coefficients and thermal conductivities in dense, multicomponent gas mixtures and supercritical mixtures."
 readme = "README.md"
 authors = [
   { name = "Vegard Gjeldvik Jervell", email = "vegard.g.j@icloud.com" },
@@ -24,17 +28,9 @@ classifiers = [
   "Programming Language :: Python :: 3.12",
 ]
 
-[tool.setuptools.package-data]
-pykingas = ["libkineticgas.*"]
-
 [project.optional-dependencies]
 test = ["pytest"]
 
-
-[tool.scikit-build]
-wheel.expand-macos-universal-tags = true
-
-
 [tool.cibuildwheel]
 #test-command = "pytest {project}/tests"
 #test-requires = ["pytest", "numpy~=1.22", "scipy~=1.7", "thermopack~=2.2"]