diff --git a/base/cvd/cuttlefish/host/commands/run_cvd/launch/netsim_server.cpp b/base/cvd/cuttlefish/host/commands/run_cvd/launch/netsim_server.cpp
index ca999c02315..8c322976b8e 100644
--- a/base/cvd/cuttlefish/host/commands/run_cvd/launch/netsim_server.cpp
+++ b/base/cvd/cuttlefish/host/commands/run_cvd/launch/netsim_server.cpp
@@ -138,9 +138,27 @@ class NetsimServer : public CommandSource {
                            config_.netsim_connector_instance_num() + 1);
     }
 
-    // Add parameters from passthrough option --netsim-args.
-    for (auto const& arg : config_.netsim_args()) {
-      netsimd.AddParameter(arg);
+    // Add parameters from passthrough option --netsim-args as environment
+    // variables.
+    std::vector<std::string> remaining_args;
+    for (const std::string& arg : config_.netsim_args()) {
+      if (android::base::StartsWith(arg, "NETSIM_NO_WEB_SERVER") ||
+          android::base::StartsWith(arg, "NETSIM_GRPC_PORT")) {
+        const std::string::size_type equals_pos = arg.find('=');
+        if (equals_pos != std::string::npos) {
+          const std::string env_key = arg.substr(0, equals_pos);
+          const std::string env_val = arg.substr(equals_pos + 1);
+          netsimd.AddEnvironmentVariable(env_key, env_val);
+        } else {
+          netsimd.AddEnvironmentVariable(arg, "1");
+        }
+      } else {
+        remaining_args.push_back(arg);
+      }
+    }
+    if (!remaining_args.empty()) {
+      netsimd.AddEnvironmentVariable("NETSIM_ARGS",
+                                     android::base::Join(remaining_args, " "));
     }
 
     // Add command for forwarding the HCI port to a vsock server.