Apply CMake sccache helper to oneapi-math

custom/override.nix

@@ -592,6 +592,9 @@ inline sycl::event submit_wait_on_events(sycl::queue q, const std::vector<sycl::
   oneapi-math-sycl-blas = modify prev.oneapi-math-sycl-blas (
     old: mkCmakeSccacheAttrs old
   );
+  oneapi-math = modify prev.oneapi-math (
+    old: mkCmakeSccacheAttrs old
+  );
   oneapi-dpl =
     let
       version = "2022.11.1";

todo.md

@@ -32,6 +32,7 @@
 - The probe bypass must inspect `@responseFile` arguments as well, because the cc-wrapper often hides `CMakeFiles/CompilerId` paths inside response files before the inner `wrapped-sccache` sees them.
 - For CMake packages, the practical fallback is to export `SCCACHE_WRAPPED_COMPILER_PASSTHROUGH=1` for the whole `configurePhase` and unset it in `postConfigure`; caching matters in `buildPhase`, not in compiler-ID probes.
 - Apply the shared CMake helper to stalled subpackages too, not just top-level wrappers. `oneapi-math-sycl-blas` is one such case.
+- The same helper may also be needed on the outer package if the subpackage is fixed but the wrapper package then stalls at its own CMake configure.
 - Build the patched `sccache` package.
 - Run a minimal hello-world derivation with the new `sccacheStdenv` and confirm repeated compiles produce cache hits.
 - If that works, switch current consumers to the ccache-style path and remove obsolete wrapper-patching logic.