diff --git a/pyproject.toml b/pyproject.toml
index b80718ab7..3f68e320d 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -188,7 +188,7 @@ dev = [
     "pytest-watcher>=0.4.3,<1",
     "pytest-xdist[psutil]>=3.8.0,<4",
     "ruff>=0.14.8,<1",
-    "scalene>=2.0.1,<3",
+    "scalene>=2.0.1,<3; sys_platform != 'win32'",  # no Windows wheel for cp311; source build fails due to PEP 695 syntax in Python 3.14 stdlib
     "sphinx>=8.2.3,<9",
     "sphinx-autobuild>=2025.8.25,<2026",
     "sphinx-click>=6.2.0,<7",
diff --git a/uv.lock b/uv.lock
index 317f24a31..8d3f1b466 100644
--- a/uv.lock
+++ b/uv.lock
@@ -136,7 +136,7 @@ dev = [
     { name = "pytest-watcher" },
     { name = "pytest-xdist", extra = ["psutil"] },
     { name = "ruff" },
-    { name = "scalene" },
+    { name = "scalene", marker = "sys_platform != 'win32'" },
     { name = "sphinx" },
     { name = "sphinx-autobuild" },
     { name = "sphinx-click" },
@@ -261,7 +261,7 @@ dev = [
     { name = "pytest-watcher", specifier = ">=0.4.3,<1" },
     { name = "pytest-xdist", extras = ["psutil"], specifier = ">=3.8.0,<4" },
     { name = "ruff", specifier = ">=0.14.8,<1" },
-    { name = "scalene", specifier = ">=2.0.1,<3" },
+    { name = "scalene", marker = "sys_platform != 'win32'", specifier = ">=2.0.1,<3" },
     { name = "sphinx", specifier = ">=8.2.3,<9" },
     { name = "sphinx-autobuild", specifier = ">=2025.8.25,<2026" },
     { name = "sphinx-click", specifier = ">=6.2.0,<7" },
@@ -6821,13 +6821,10 @@ wheels = [
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 [[package]]