more test issues

overlays/default.nix

@@ -16,6 +16,7 @@
   };
 
   test-exclusions = import ./test-exclusions.nix;
+  x86-64-v3-workarounds = import ./x86-64-v3-workarounds.nix;
 
   python-env = final: _prev: {
     my_python = final.python314.withPackages (

overlays/test-exclusions.nix

@@ -17,6 +17,15 @@ _final: prev: {
     '';
   });
 
+  onnxruntime = prev.onnxruntime.overrideAttrs (old: {
+    # OpenVINO uses a different QuantizeLinear formulation. x86-64-v3 moves
+    # these INT8 results by one quantization unit; we accept that inference-
+    # precision risk for our workloads.
+    env = (old.env or { }) // {
+      GTEST_FILTER = "*:-QuantizeLinearOpTest.Int8:QuantizeLinearOpTest.OVEP_Int8_NegativeZeroPoint:QuantizeLinearOpTest.OVEP_Int8_PositiveZeroPoint";
+    };
+  });
+
   prometheus = prev.prometheus.overrideAttrs (
     old:
     let
@@ -71,6 +80,18 @@ _final: prev: {
         ];
       });
 
+      jupyter-server = pythonPrev.jupyter-server.overridePythonAttrs (old: {
+        # The kernel reply arrived after the one-second outer deadline when the
+        # builder was heavily loaded. Keep the regression test but allow it the
+        # same margin as the other resource-sensitive tests.
+        postPatch = (old.postPatch or "") + ''
+          substituteInPlace tests/services/kernels/test_connection.py \
+            --replace-fail \
+            "await asyncio.wait_for(asyncio.wrap_future(conn2.request_kernel_info()), timeout=1.0)" \
+            "await asyncio.wait_for(asyncio.wrap_future(conn2.request_kernel_info()), timeout=10.0)"
+        '';
+      });
+
       scipy = pythonPrev.scipy.overridePythonAttrs (old: {
         # x86-64-v3 FFT implementations produce rounding differences outside
         # these tests' strict tolerances. We accept the numerical-precision
@@ -80,6 +101,33 @@ _final: prev: {
           "test_roundtrip_scaling"
         ];
       });
+
+      sentry-sdk = pythonPrev.sentry-sdk.overridePythonAttrs (old: {
+        # This test globally mocks threading.current_thread while another
+        # thread is running. On Python 3.14, Thread.join can race with that
+        # mock and exhaust its single side effect before the worker removes it.
+        disabledTests = (old.disabledTests or [ ]) ++ [
+          "test_get_current_thread_meta_main_thread"
+        ];
+      });
+
+      torchcodec = pythonPrev.torchcodec.overridePythonAttrs (old: {
+        # For these 8 kHz MP3 cases, the x86-64-v3 API and CLI codec paths
+        # differ in 0.8% of decoded samples. Retain the original tolerance for
+        # 99% of samples and accept the localized audio-precision risk.
+        postPatch = (old.postPatch or "") + ''
+          substituteInPlace test/test_encoders.py \
+            --replace-fail \
+            'if sys.platform == "darwin":' \
+            'if sys.platform == "darwin" or (
+                format == "mp3"
+                and sample_rate == 8_000
+                and asset is SINE_MONO_S32
+                and bit_rate in (None, 0)
+                and num_channels in (None, 1)
+            ):'
+        '';
+      });
     })
   ];
 }

overlays/x86-64-v3-workarounds.nix

@@ -0,0 +1,20 @@
+# Compatibility fixes for packages rebuilt with x86-64-v3.
+#
+# The v3 baseline enables instructions that expose source assumptions hidden
+# by the generic x86-64 build. Keep compile fixes here, separate from test
+# exclusions, until upstream or nixpkgs incorporates them.
+_final: prev:
+prev.lib.optionalAttrs ((prev.stdenv.hostPlatform.gcc.arch or null) == "x86-64-v3") {
+  deno =
+    let
+      librusty_v8 = prev.deno.passthru.librusty_v8.overrideAttrs (old: {
+        # Clang prohibits including its internal BMI2 header directly. The
+        # public umbrella supplies the same intrinsics with the required setup.
+        postPatch = (old.postPatch or "") + ''
+          substituteInPlace third_party/abseil-cpp/absl/container/internal/raw_hash_set.h \
+            --replace-fail "#include <bmi2intrin.h>" "#include <immintrin.h>"
+        '';
+      });
+    in
+    prev.deno.override { inherit librusty_v8; };
+}