diff --git a/.github/workflows/docs.yml b/.github/workflows/docs.yml
index 3331b8792..1d1f2c121 100644
--- a/.github/workflows/docs.yml
+++ b/.github/workflows/docs.yml
@@ -9,9 +9,9 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
-    - uses: actions/checkout@v3
+    - uses: actions/checkout@v4
     - name: Set up Python
-      uses: actions/setup-python@v4
+      uses: actions/setup-python@v5
       with:
         python-version: 3.11
         
diff --git a/.github/workflows/downstream_test.yml b/.github/workflows/downstream_test.yml
index bd582f99e..2545875a1 100644
--- a/.github/workflows/downstream_test.yml
+++ b/.github/workflows/downstream_test.yml
@@ -10,9 +10,9 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
-    - uses: actions/checkout@v3
+    - uses: actions/checkout@v4
     - name: Set up Python
-      uses: actions/setup-python@v4
+      uses: actions/setup-python@v5
       with:
         python-version: 3.9
     - name: Install dependencies
diff --git a/.github/workflows/full_test.yml b/.github/workflows/full_test.yml
index 601da8b2e..3eda9b3f0 100644
--- a/.github/workflows/full_test.yml
+++ b/.github/workflows/full_test.yml
@@ -20,13 +20,13 @@ jobs:
         python-version: [3.9, "3.12"]
 
     steps:
-    - uses: actions/checkout@v3
+    - uses: actions/checkout@v4
     - uses: chartboost/ruff-action@v1 # Fail fast if there are any linting errors
       with:
         version: 0.6.2 # consistent with pyproject.toml ?
         src: mikeio # ignore notebooks
     - name: Set up Python ${{ matrix.python-version }}
-      uses: actions/setup-python@v4
+      uses: actions/setup-python@v5
       with:
         python-version: ${{ matrix.python-version }}
     - name: Install dependencies
@@ -44,3 +44,13 @@ jobs:
       run: make doctest
     - name: Static type check
       run: make typecheck
+    - name: Build package
+      run: |
+        pip install build wheel twine
+        python -m build
+        
+    - name: Upload build artifact
+      uses: actions/upload-artifact@v4
+      with:
+        name: dist-${{matrix.os}}-${{matrix.python-version}}
+        path: dist/*
diff --git a/.github/workflows/legacy_test.yml b/.github/workflows/legacy_test.yml
index df10ac375..d8eece050 100644
--- a/.github/workflows/legacy_test.yml
+++ b/.github/workflows/legacy_test.yml
@@ -13,9 +13,9 @@ jobs:
         runs-on: ubuntu-latest
 
         steps:
-        - uses: actions/checkout@v3
+        - uses: actions/checkout@v4
         - name: Set up Python
-          uses: actions/setup-python@v4
+          uses: actions/setup-python@v5
           with:
             python-version: 3.9
               
diff --git a/.github/workflows/notebooks_test.yml b/.github/workflows/notebooks_test.yml
index c3d37128c..ff6ee147b 100644
--- a/.github/workflows/notebooks_test.yml
+++ b/.github/workflows/notebooks_test.yml
@@ -14,9 +14,9 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
-    - uses: actions/checkout@v3
+    - uses: actions/checkout@v4
     - name: Set up Python
-      uses: actions/setup-python@v4
+      uses: actions/setup-python@v5
       with:
         python-version: '3.9'    
     - name: Install mikeio
diff --git a/.github/workflows/perf_test.yml b/.github/workflows/perf_test.yml
index 1b39e73cf..9bd61290e 100644
--- a/.github/workflows/perf_test.yml
+++ b/.github/workflows/perf_test.yml
@@ -17,9 +17,9 @@ jobs:
         python-version: ["3.10"]
 
     steps:
-    - uses: actions/checkout@v3
+    - uses: actions/checkout@v4
     - name: Set up Python ${{ matrix.python-version }}
-      uses: actions/setup-python@v4
+      uses: actions/setup-python@v5
       with:
         python-version: ${{ matrix.python-version }}
     - name: Install dependencies
diff --git a/.github/workflows/python-publish.yml b/.github/workflows/python-publish.yml
index c6b0174ba..e011f10ad 100644
--- a/.github/workflows/python-publish.yml
+++ b/.github/workflows/python-publish.yml
@@ -18,9 +18,9 @@ jobs:
 
 
     steps:
-    - uses: actions/checkout@v3
+    - uses: actions/checkout@v4
     - name: Set up Python
-      uses: actions/setup-python@v4
+      uses: actions/setup-python@v5
       with:
         python-version: '3.10'
     - name: Install dependencies
diff --git a/MANIFEST.in b/MANIFEST.in
deleted file mode 100644
index 27ca010fe..000000000
--- a/MANIFEST.in
+++ /dev/null
@@ -1,2 +0,0 @@
-graft mikeio/bin
-include License.txt
diff --git a/Makefile b/Makefile
index e670e4be4..5e6693da0 100644
--- a/Makefile
+++ b/Makefile
@@ -1,14 +1,12 @@
 LIB = mikeio
 
-LIB = mikeio
-
 check: lint typecheck test
 
 build: typecheck test
 	python -m build
 
 lint:
-	ruff check mikeio
+	ruff check $(LIB)/
 
 format:
 	ruff format $(LIB)/
diff --git a/mikeio/__init__.py b/mikeio/__init__.py
index c483450ca..2259317e2 100644
--- a/mikeio/__init__.py
+++ b/mikeio/__init__.py
@@ -21,9 +21,9 @@
 # 'X.Y.dev0' is the canonical version of 'X.Y.dev'
 #
 
-__version__ = "2.1.0"  # TODO use git hash instead for dev version?
+__version__ = "2.2.dev0"  # TODO use git hash instead for dev version?
 # __version__ = "1.5.0"
-__dfs_version__: int = 210
+__dfs_version__: int = 220
 
 
 if "64" not in architecture()[0]:
diff --git a/pyproject.toml b/pyproject.toml
index 0b7793419..8a919ca6e 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -3,14 +3,11 @@ requires = ["hatchling"]
 build-backend = "hatchling.build"
 
 [tool.hatch.build.targets.sdist]
-exclude = ["notebooks", "tests", "images"]
-
-[tool.hatch.metadata]
-allow-direct-references = true
+exclude = ["notebooks", "tests", "images", ".github", "docs", ".devcontainer", "*.md", "*.txt", ".gitattributes"]
 
 [project]
 name="mikeio"
-version="2.1.0"
+version="2.2.dev0"
 dependencies = [
     "mikecore>=0.2.1",
     "numpy>=1.22.0",