python3Packages.jaxlib-bin: fix ofborg evaluation

See https://discourse.nixos.org/t/ofborg-does-not-respect-meta-platforms/27019 for more info.

pkgs/development/python-modules/jaxlib/bin.nix

@@ -77,7 +77,13 @@ buildPythonPackage rec {
   # python version.
   disabled = !(pythonVersion == "3.10");
 
-  src = if !cudaSupport then cpuSrcs."${stdenv.hostPlatform.system}" else gpuSrc;
+  # See https://discourse.nixos.org/t/ofborg-does-not-respect-meta-platforms/27019/6.
+  src =
+    if !cudaSupport then
+      (
+        cpuSrcs."${stdenv.hostPlatform.system}"
+          or (throw "jaxlib-bin is not supported on ${stdenv.hostPlatform.system}")
+      ) else gpuSrc;
 
   # Prebuilt wheels are dynamically linked against things that nix can't find.
   # Run `autoPatchelfHook` to automagically fix them.