pin setuptools < 65, required by numpy.distutils

pin flake8 < 5, required by pytest

.github/workflows/build.yaml

@@ -30,7 +30,7 @@ jobs:
 
       - name: Build and install
         run: |
-          python -m pip install --upgrade "pip<22" setuptools
+          python -m pip install --upgrade pip "setuptools<65" "flake8<5"
           python -m pip install .[yaml,test]
 
       - name: Run tests
@@ -54,7 +54,7 @@ jobs:
 
       - name: Install dependencies
         run: |
-          pip install --upgrade setuptools wheel build
+          pip install --upgrade "setuptools<65" wheel build
 
       - name: Build and create distribution
         run: |
@@ -98,7 +98,7 @@ jobs:
 
       - name: Install dependencies
         run: |
-          pip install --upgrade setuptools wheel cibuildwheel
+          pip install --upgrade "setuptools<65" wheel cibuildwheel
 
       - name: Build and create distribution
         run: |

.github/workflows/cmake.yaml

@@ -20,6 +20,9 @@ jobs:
         with:
           python-version: 3.8
 
+      - name: Update Python packages
+        run: pip install --upgrade "setuptools<65" "flake8<5"
+
       - name: Install Python prereqs
         run: |
           pip install \

pyproject.toml

@@ -1,6 +1,6 @@
 [build-system]
 requires = [
-    "setuptools",
+    "setuptools<65",
     "lsst-versions >= 1.3.0",
     "wheel",
     "pybind11 >= 2.5.0",
@@ -40,7 +40,7 @@ dynamic = ["version"]
 [project.optional-dependencies]
 test = [
     "pytest >= 3.2",
-    "flake8 >= 3.7.5",
+    "flake8",
     "pytest-flake8 >= 1.0.4",
 ]
 yaml = ["pyyaml >= 5.1"]