diff --git a/tests/__init__.py b/fastcan/tests/__init__.py
similarity index 100%
rename from tests/__init__.py
rename to fastcan/tests/__init__.py
diff --git a/tests/test_beam.py b/fastcan/tests/test_beam.py
similarity index 100%
rename from tests/test_beam.py
rename to fastcan/tests/test_beam.py
diff --git a/tests/test_fastcan.py b/fastcan/tests/test_fastcan.py
similarity index 100%
rename from tests/test_fastcan.py
rename to fastcan/tests/test_fastcan.py
diff --git a/tests/test_init.py b/fastcan/tests/test_init.py
similarity index 100%
rename from tests/test_init.py
rename to fastcan/tests/test_init.py
diff --git a/tests/test_minibatch.py b/fastcan/tests/test_minibatch.py
similarity index 100%
rename from tests/test_minibatch.py
rename to fastcan/tests/test_minibatch.py
diff --git a/tests/test_refine.py b/fastcan/tests/test_refine.py
similarity index 100%
rename from tests/test_refine.py
rename to fastcan/tests/test_refine.py
diff --git a/tests/test_utils.py b/fastcan/tests/test_utils.py
similarity index 100%
rename from tests/test_utils.py
rename to fastcan/tests/test_utils.py
diff --git a/meson.build b/meson.build
index 979b0fc..ed3da8b 100644
--- a/meson.build
+++ b/meson.build
@@ -11,6 +11,10 @@ project(
 
 py = import('python').find_installation(pure: false)
 
-install_subdir('fastcan', install_dir: py.get_install_dir())
+install_subdir(
+  'fastcan',
+  install_dir: py.get_install_dir(),
+  install_tag: 'python-runtime',
+)
 
 subdir('fastcan')
diff --git a/pixi.lock b/pixi.lock
index b159be4..446997e 100644
--- a/pixi.lock
+++ b/pixi.lock
@@ -9396,7 +9396,7 @@ packages:
 - pypi: ./
   name: fastcan
   version: 0.4.1
-  sha256: 9adaeb6b0c2755d295b596f2e031b27713a59f979b4afe636825792f8e0b9510
+  sha256: e30c3109632ae05eea094ad7a70a6219b888c09cb905957d988a3bf942c7aeb0
   requires_dist:
   - scikit-learn>=1.6.0
   requires_python: '>=3.9'
diff --git a/pixi.toml b/pixi.toml
index db96c6b..d424c74 100644
--- a/pixi.toml
+++ b/pixi.toml
@@ -101,7 +101,7 @@ test = "pytest"
 test-coverage = { cmd = "rm -rf .coverage && pytest --cov-report {{ FMT }} --cov={{ PACKAGE }}", args = [{ arg = "FMT", default = "html" }, { arg = "PACKAGE", default = "fastcan" }] }
 
 [feature.build.tasks]
-build-wheel = "rm -rf dist && python -m build -wnx -Cinstall-args=--tags=runtime,python-runtime,devel"
+build-wheel = "rm -rf dist && python -m build -wnx"
 build-sdist = "rm -rf dist && python -m build --sdist"
 rebuild = "rm -rf build && pip install --no-deps --force-reinstall -e ."
 
diff --git a/pyproject.toml b/pyproject.toml
index 6a41762..4a51ee4 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -48,10 +48,18 @@ build-backend = "mesonpy"
 # toolchain
 [tool.meson-python.args]
 setup = ['--vsenv']
+install = ['--tags=runtime,python-runtime']
+
+# [tool.meson-python.wheel] # TODO: enable when meson-python 0.19.0 is released
+# exclude = [
+#     "**/*.pyx",
+#     "**/*.pxd",
+#     "**/__pycache__/*",
+# ]
 
 [tool.pytest.ini_options]
 testpaths = [ 
-    "./tests",
+    "./fastcan/tests",
     "./fastcan/narx/tests",
 ]