Specifically avoid 4.5.0

Author: mrmundt

.github/workflows/test_branches.yml

@@ -375,10 +375,10 @@ jobs:
         echo ""
         echo "*** Install Pyomo dependencies ***"
         # For windows, cannot use newer setuptools because of APPSI compilation issues
-        # There are also issues with newer platformdirs on windows for 3.13/3.14,
-        # so pinning that plus a generally considered more "stable" pip version
+        # There seems to be some specific problem with platformdirs 4.5.0
+        # on win 3.13/3.14 as of 2025-10-23
         if test "${{matrix.TARGET}}" == 'win'; then
-            CONDA_DEPENDENCIES="$CONDA_DEPENDENCIES setuptools<74.0.0 platformdirs<3.0 pip<25.0"
+            CONDA_DEPENDENCIES="$CONDA_DEPENDENCIES setuptools<74.0.0 platformdirs!=4.5.0"
         fi
         # Note: this will fail the build if any installation fails (or
         # possibly if it outputs messages to stderr)

.github/workflows/test_pr_and_main.yml

@@ -426,11 +426,11 @@ jobs:
         done
         echo ""
         echo "*** Install Pyomo dependencies ***"
-        # For windows, cannot use newer setuptools because of APPSI compilation issues.
-        # There are also issues with newer platformdirs on windows for 3.13/3.14,
-        # so pinning that plus a generally considered more "stable" pip version
+        # For windows, cannot use newer setuptools because of APPSI compilation issues
+        # There seems to be some specific problem with platformdirs 4.5.0
+        # on win 3.13/3.14 as of 2025-10-23
         if test "${{matrix.TARGET}}" == 'win'; then
-            CONDA_DEPENDENCIES="$CONDA_DEPENDENCIES setuptools<74.0.0 platformdirs<3.0 pip<25.0"
+            CONDA_DEPENDENCIES="$CONDA_DEPENDENCIES setuptools<74.0.0 platformdirs!=4.5.0"
         fi
         # Note: this will fail the build if any installation fails (or
         # possibly if it outputs messages to stderr)

4.4

@@ -0,0 +1,5 @@
+Channels:
+ - defaults
+Platform: osx-arm64
+Collecting package metadata (repodata.json): ...working... done
+Solving environment: ...working... failed