testing x86_v3

common/optional/x86-64-v3.nix

@@ -0,0 +1,9 @@
+{
+  nixpkgs.hostPlatform = {
+    system = "x86_64-linux";
+    gcc = {
+      arch = "x86-64-v3";
+      tune = "generic";
+    };
+  };
+}