diff --git a/.github/workflows/test_branches.yml b/.github/workflows/test_branches.yml
index 109aa2c38d5..530ab9cc4e1 100644
--- a/.github/workflows/test_branches.yml
+++ b/.github/workflows/test_branches.yml
@@ -375,8 +375,10 @@ jobs:
         echo ""
         echo "*** Install Pyomo dependencies ***"
         # 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"
+            CONDA_DEPENDENCIES="$CONDA_DEPENDENCIES setuptools<74.0.0 platformdirs!=4.5.0"
         fi
         # Note: this will fail the build if any installation fails (or
         # possibly if it outputs messages to stderr)
diff --git a/.github/workflows/test_pr_and_main.yml b/.github/workflows/test_pr_and_main.yml
index 906d802ce4b..59924f6d0e1 100644
--- a/.github/workflows/test_pr_and_main.yml
+++ b/.github/workflows/test_pr_and_main.yml
@@ -427,8 +427,10 @@ jobs:
         echo ""
         echo "*** Install Pyomo dependencies ***"
         # For windows, cannot use newer setuptools because of APPSI compilation issues
+        # There seems to be some specific problem with platformdirs 4.5.0
+        # on win 3.13/3.14 as of 2025-10-23
         if test "${{matrix.TARGET}}" == 'win'; then
-            CONDA_DEPENDENCIES="$CONDA_DEPENDENCIES setuptools<74.0.0"
+            CONDA_DEPENDENCIES="$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)