diff --git a/op-chain-ops/genesis/config.go b/op-chain-ops/genesis/config.go
index 0e1e4dcfa581..242e5c45ce7e 100644
--- a/op-chain-ops/genesis/config.go
+++ b/op-chain-ops/genesis/config.go
@@ -388,41 +388,28 @@ func (d *DeployConfig) SetDeployments(deployments *L1Deployments) {
 }
 
 // GetDeployedAddresses will get the deployed addresses of deployed L1 contracts
-// required for the L2 genesis creation. Legacy systems use the `Proxy__` prefix
-// while modern systems use the `Proxy` suffix. First check for the legacy
-// deployments so that this works with upgrading a system.
+// required for the L2 genesis creation.
 func (d *DeployConfig) GetDeployedAddresses(hh *hardhat.Hardhat) error {
-	var err error
-
 	if d.L1StandardBridgeProxy == (common.Address{}) {
-		var l1StandardBridgeProxyDeployment *hardhat.Deployment
-		l1StandardBridgeProxyDeployment, err = hh.GetDeployment("Proxy__OVM_L1StandardBridge")
-		if errors.Is(err, hardhat.ErrCannotFindDeployment) {
-			l1StandardBridgeProxyDeployment, err = hh.GetDeployment("L1StandardBridgeProxy")
-			if err != nil {
-				return err
-			}
+		l1StandardBridgeProxyDeployment, err := hh.GetDeployment("L1StandardBridgeProxy")
+		if err != nil {
+			return fmt.Errorf("cannot find L1StandardBridgeProxy artifact: %w", err)
 		}
 		d.L1StandardBridgeProxy = l1StandardBridgeProxyDeployment.Address
 	}
 
 	if d.L1CrossDomainMessengerProxy == (common.Address{}) {
-		var l1CrossDomainMessengerProxyDeployment *hardhat.Deployment
-		l1CrossDomainMessengerProxyDeployment, err = hh.GetDeployment("Proxy__OVM_L1CrossDomainMessenger")
-		if errors.Is(err, hardhat.ErrCannotFindDeployment) {
-			l1CrossDomainMessengerProxyDeployment, err = hh.GetDeployment("L1CrossDomainMessengerProxy")
-			if err != nil {
-				return err
-			}
+		l1CrossDomainMessengerProxyDeployment, err := hh.GetDeployment("L1CrossDomainMessengerProxy")
+		if err != nil {
+			return fmt.Errorf("cannot find L1CrossDomainMessengerProxy artifact: %w", err)
 		}
 		d.L1CrossDomainMessengerProxy = l1CrossDomainMessengerProxyDeployment.Address
 	}
 
 	if d.L1ERC721BridgeProxy == (common.Address{}) {
-		// There is no legacy deployment of this contract
 		l1ERC721BridgeProxyDeployment, err := hh.GetDeployment("L1ERC721BridgeProxy")
 		if err != nil {
-			return err
+			return fmt.Errorf("cannot find L1ERC721BridgeProxy artifact: %w", err)
 		}
 		d.L1ERC721BridgeProxy = l1ERC721BridgeProxyDeployment.Address
 	}
@@ -430,7 +417,7 @@ func (d *DeployConfig) GetDeployedAddresses(hh *hardhat.Hardhat) error {
 	if d.SystemConfigProxy == (common.Address{}) {
 		systemConfigProxyDeployment, err := hh.GetDeployment("SystemConfigProxy")
 		if err != nil {
-			return err
+			return fmt.Errorf("cannot find SystemConfigProxy artifact: %w", err)
 		}
 		d.SystemConfigProxy = systemConfigProxyDeployment.Address
 	}
@@ -438,7 +425,7 @@ func (d *DeployConfig) GetDeployedAddresses(hh *hardhat.Hardhat) error {
 	if d.OptimismPortalProxy == (common.Address{}) {
 		optimismPortalProxyDeployment, err := hh.GetDeployment("OptimismPortalProxy")
 		if err != nil {
-			return err
+			return fmt.Errorf("cannot find OptimismPortalProxy artifact: %w", err)
 		}
 		d.OptimismPortalProxy = optimismPortalProxyDeployment.Address
 	}
diff --git a/op-node/cmd/genesis/cmd.go b/op-node/cmd/genesis/cmd.go
index f5e8ebd872b3..2bbb8e70567f 100644
--- a/op-node/cmd/genesis/cmd.go
+++ b/op-node/cmd/genesis/cmd.go
@@ -28,7 +28,7 @@ var Subcommands = cli.Commands{
 		Flags: []cli.Flag{
 			&cli.StringFlag{
 				Name:     "deploy-config",
-				Usage:    "Path to hardhat deploy config file",
+				Usage:    "Path to deploy config file",
 				Required: true,
 			},
 			&cli.StringFlag{
@@ -91,18 +91,26 @@ var Subcommands = cli.Commands{
 	{
 		Name:  "l2",
 		Usage: "Generates an L2 genesis file and rollup config suitable for a deployed network",
+		Description: "Generating the L2 genesis depends on knowledge of L1 contract addresses for the bridge to be secure. " +
+			"A deploy config and either a deployment directory or an L1 deployments file are used to create the L2 genesis. " +
+			"The deploy directory and L1 deployments file are generated by the L1 contract deployments.",
 		Flags: []cli.Flag{
 			&cli.StringFlag{
 				Name:  "l1-rpc",
 				Usage: "L1 RPC URL",
 			},
 			&cli.StringFlag{
-				Name:  "deploy-config",
-				Usage: "Path to deploy config file",
+				Name:     "deploy-config",
+				Usage:    "Path to deploy config file",
+				Required: true,
 			},
 			&cli.StringFlag{
 				Name:  "deployment-dir",
-				Usage: "Path to network deployment directory",
+				Usage: "Path to network deployment directory. Cannot be used with --l1-deployments",
+			},
+			&cli.StringFlag{
+				Name:  "l1-deployments",
+				Usage: "Path to L1 deployments JSON file. Cannot be used with --deployment-dir",
 			},
 			&cli.StringFlag{
 				Name:  "outfile.l2",
@@ -122,20 +130,36 @@ var Subcommands = cli.Commands{
 			}
 
 			deployDir := ctx.String("deployment-dir")
-			if deployDir == "" {
-				return errors.New("Must specify --deployment-dir")
+			l1Deployments := ctx.String("l1-deployments")
+
+			if deployDir != "" && l1Deployments != "" {
+				return errors.New("cannot specify both --deployment-dir and --l1-deployments")
+			}
+			if deployDir == "" && l1Deployments == "" {
+				return errors.New("must specify either --deployment-dir or --l1-deployments")
 			}
 
-			log.Info("Deployment directory", "path", deployDir)
-			depPath, network := filepath.Split(deployDir)
-			hh, err := hardhat.New(network, nil, []string{depPath})
-			if err != nil {
-				return err
+			if deployDir != "" {
+				log.Info("Deployment directory", "path", deployDir)
+				depPath, network := filepath.Split(deployDir)
+				hh, err := hardhat.New(network, nil, []string{depPath})
+				if err != nil {
+					return err
+				}
+
+				// Read the appropriate deployment addresses from disk
+				if err := config.GetDeployedAddresses(hh); err != nil {
+					return err
+				}
 			}
 
-			// Read the appropriate deployment addresses from disk
-			if err := config.GetDeployedAddresses(hh); err != nil {
-				return err
+			if l1Deployments != "" {
+				log.Info("L1 deployments", "path", l1Deployments)
+				deployments, err := genesis.NewL1Deployments(l1Deployments)
+				if err != nil {
+					return err
+				}
+				config.SetDeployments(deployments)
 			}
 
 			client, err := ethclient.Dial(ctx.String("l1-rpc"))