Hydra only build x86_64-linux

flake.nix

@@ -51,6 +51,9 @@
             ffmpeg_5-headless
           ];
 
+          meta = {
+            hydraPlatforms = [ "x86_64-linux" ];
+          };
           # Additional environment variables can be set directly
           # MY_CUSTOM_VAR = "some value";
         };
@@ -130,5 +133,6 @@
               rust-analyzer
             ];
           };
-      });
+        }
+    );
 }