diff --git a/.github/tests/external-l1/ethereum.yaml b/.github/tests/external-l1/ethereum.yaml
new file mode 100644
index 00000000..f098a522
--- /dev/null
+++ b/.github/tests/external-l1/ethereum.yaml
@@ -0,0 +1,13 @@
+network_params:
+    preset: minimal
+    genesis_delay: 5
+    additional_preloaded_contracts: '
+      {
+        "0x4e59b44847b379578588920cA78FbF26c0B4956C": {
+          "balance": "0ETH",
+          "code": "0x7fffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffe03601600081602082378035828234f58015156039578182fd5b8082525050506014600cf3",
+          "storage": {},
+          "nonce": "1"
+        }
+      }
+    '
diff --git a/.github/tests/external-l1/optimism.yaml b/.github/tests/external-l1/optimism.yaml
new file mode 100644
index 00000000..9aa8f8bf
--- /dev/null
+++ b/.github/tests/external-l1/optimism.yaml
@@ -0,0 +1,7 @@
+external_l1_network_params:
+  network_id: "3151908"
+  rpc_kind: standard
+  el_rpc_url: http://el-1-geth-lighthouse:8545
+  el_ws_url: ws://el-1-geth-lighthouse:8546
+  cl_rpc_url: http://cl-1-lighthouse-geth:4000
+  priv_key: "0xbcdf20249abf0ed6d944c0288fad489e33f66b3960d9e6229c1cd214ed3bbe31"
diff --git a/.github/workflows/nightly.yml b/.github/workflows/nightly.yml
index 2fdce7be..d6b27a96 100644
--- a/.github/workflows/nightly.yml
+++ b/.github/workflows/nightly.yml
@@ -58,3 +58,23 @@ jobs:
           DISCORD_WEBHOOK: ${{ secrets.DISCORD_WEBHOOK }}
         with:
           args: "The nightly test for ${{matrix.file_name}} on optimism-package has failed find it here ${{ github.server_url }}/${{ github.repository }}/actions/runs/${{ github.run_id }}"
+
+  run_with_external_l1_args:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout Repository
+        uses: actions/checkout@v4
+
+      - name: Setup Kurtosis
+        run: |
+          echo "deb [trusted=yes] https://apt.fury.io/kurtosis-tech/ /" | sudo tee /etc/apt/sources.list.d/kurtosis.list
+          sudo apt update
+          sudo apt install kurtosis-cli
+          kurtosis analytics disable
+      
+      - name: Deploy L1
+        run: kurtosis run --enclave test --args-file ./.github/tests/external-l1/ethereum.yaml github.com/ethpandaops/ethereum-package
+      
+      - name: Run Starlark
+        run: |
+          kurtosis run --enclave test --verbosity detailed --args-file ./.github/tests/external-l1/optimism.yaml ${{ github.workspace }}
diff --git a/kurtosis.yml b/kurtosis.yml
index 5973d737..88e68aad 100644
--- a/kurtosis.yml
+++ b/kurtosis.yml
@@ -1,4 +1,4 @@
-name: "github.com/ethpandaops/optimism-package"
+name: github.com/ethpandaops/optimism-package
 description: |
   # Optimism Package
   This is a Kurtosis package for deploying an Optimism Rollup
diff --git a/main.star b/main.star
index 69678d2d..36624695 100644
--- a/main.star
+++ b/main.star
@@ -16,8 +16,14 @@ def run(plan, args):
     plan.print("Parsing the L1 input args")
     # If no args are provided, use the default values with minimal preset
     ethereum_args = args.get("ethereum_package", {})
-    if "network_params" not in ethereum_args:
-        ethereum_args.update(input_parser.default_ethereum_package_network_params())
+    external_l1_args = args.get("external_l1_network_params", {})
+    if external_l1_args:
+        external_l1_args = input_parser.external_l1_network_params_input_parser(
+            plan, external_l1_args
+        )
+    else:
+        if "network_params" not in ethereum_args:
+            ethereum_args.update(input_parser.default_ethereum_package_network_params())
 
     # need to do a raw get here in case only optimism_package is provided.
     # .get will return None if the key is in the config with a None value.
@@ -29,21 +35,38 @@ def run(plan, args):
     persistent = optimism_args_with_right_defaults.persistent
 
     # Deploy the L1
-    plan.print("Deploying a local L1")
-    l1 = ethereum_package.run(plan, ethereum_args)
-    plan.print(l1.network_params)
-    # Get L1 info
-    all_l1_participants = l1.all_participants
-    l1_network_params = l1.network_params
-    l1_network_id = l1.network_id
-    l1_priv_key = l1.pre_funded_accounts[
-        12
-    ].private_key  # reserved for L2 contract deployers
-    l1_config_env_vars = get_l1_config(
-        all_l1_participants, l1_network_params, l1_network_id
-    )
+    l1_network = ""
+    if external_l1_args:
+        plan.print("Using external L1")
+        plan.print(external_l1_args)
+
+        l1_rpc_url = external_l1_args.el_rpc_url
+        l1_priv_key = external_l1_args.priv_key
+
+        l1_config_env_vars = {
+            "L1_RPC_KIND": external_l1_args.rpc_kind,
+            "L1_RPC_URL": l1_rpc_url,
+            "CL_RPC_URL": external_l1_args.cl_rpc_url,
+            "L1_WS_URL": external_l1_args.el_ws_url,
+            "L1_CHAIN_ID": external_l1_args.network_id,
+        }
+    else:
+        plan.print("Deploying a local L1")
+        l1 = ethereum_package.run(plan, ethereum_args)
+        plan.print(l1.network_params)
+        # Get L1 info
+        all_l1_participants = l1.all_participants
+        l1_network_params = l1.network_params
+        l1_network_id = l1.network_id
+        l1_rpc_url = all_l1_participants[0].el_context.rpc_http_url
+        l1_priv_key = l1.pre_funded_accounts[
+            12
+        ].private_key  # reserved for L2 contract deployers
+        l1_config_env_vars = get_l1_config(
+            all_l1_participants, l1_network_params, l1_network_id
+        )
 
-    if l1_network_params.network == "kurtosis":
+    if l1_network == "kurtosis":
         plan.print("Waiting for L1 to start up")
         wait_for_sync.wait_for_startup(plan, l1_config_env_vars)
     else:
@@ -65,7 +88,7 @@ def run(plan, args):
             deployment_output,
             l1_config_env_vars,
             l1_priv_key,
-            all_l1_participants[0].el_context,
+            l1_rpc_url,
             global_log_level,
             global_node_selectors,
             global_tolerations,
@@ -83,7 +106,7 @@ def run(plan, args):
             optimism_args,
             l1_config_env_vars,
             l1_priv_key,
-            all_l1_participants[0].el_context,
+            l1_rpc_url,
             global_log_level,
             global_node_selectors,
             global_tolerations,
@@ -117,7 +140,7 @@ def run(plan, args):
                 l2_args,
                 l1_config_env_vars,
                 l1_priv_key,
-                all_l1_participants[0].el_context,
+                l1_rpc_url,
                 global_log_level,
                 global_node_selectors,
                 global_tolerations,
diff --git a/src/blockscout/blockscout_launcher.star b/src/blockscout/blockscout_launcher.star
index 8316d9fc..3b68eab0 100644
--- a/src/blockscout/blockscout_launcher.star
+++ b/src/blockscout/blockscout_launcher.star
@@ -45,7 +45,7 @@ VERIF_USED_PORTS = {
 def launch_blockscout(
     plan,
     l2_services_suffix,
-    l1_el_context,
+    l1_rpc_url,
     l2_el_context,
     l2_network_name,
     deployment_output,
@@ -79,7 +79,7 @@ def launch_blockscout(
 
     config_backend = get_config_backend(
         postgres_output,
-        l1_el_context,
+        l1_rpc_url,
         l2_el_context,
         verif_url,
         l2_network_name,
@@ -122,7 +122,7 @@ def get_config_verif():
 
 def get_config_backend(
     postgres_output,
-    l1_el_context,
+    l1_rpc_url,
     l2_el_context,
     verif_url,
     l2_network_name,
@@ -139,7 +139,7 @@ def get_config_backend(
 
     optimism_env_vars = {
         "CHAIN_TYPE": "optimism",
-        "INDEXER_OPTIMISM_L1_RPC": l1_el_context.rpc_http_url,
+        "INDEXER_OPTIMISM_L1_RPC": l1_rpc_url,
         # "INDEXER_OPTIMISM_L1_PORTAL_CONTRACT": "",
         # "INDEXER_OPTIMISM_L1_BATCH_START_BLOCK": "",
         "INDEXER_OPTIMISM_L1_BATCH_INBOX": "0xff00000000000000000000000000000000042069",
diff --git a/src/l2.star b/src/l2.star
index f3ff471e..ca80caa6 100644
--- a/src/l2.star
+++ b/src/l2.star
@@ -15,7 +15,7 @@ def launch_l2(
     deployment_output,
     l1_config,
     l1_priv_key,
-    l1_bootnode_context,
+    l1_rpc_url,
     global_log_level,
     global_node_selectors,
     global_tolerations,
@@ -67,7 +67,7 @@ def launch_l2(
             blockscout.launch_blockscout(
                 plan,
                 l2_services_suffix,
-                l1_bootnode_context,  # first l1 EL url
+                l1_rpc_url,
                 all_el_contexts[0],  # first l2 EL url
                 network_params.name,
                 deployment_output,
diff --git a/src/package_io/input_parser.star b/src/package_io/input_parser.star
index 99e6bae1..737e279b 100644
--- a/src/package_io/input_parser.star
+++ b/src/package_io/input_parser.star
@@ -28,6 +28,18 @@ DEFAULT_PROPOSER_IMAGES = {
 DEFAULT_ADDITIONAL_SERVICES = []
 
 
+def external_l1_network_params_input_parser(plan, input_args):
+    sanity_check.external_l1_network_params_input_parser(plan, input_args)
+    return struct(
+        network_id=input_args["network_id"],
+        rpc_kind=input_args["rpc_kind"],
+        el_rpc_url=input_args["el_rpc_url"],
+        el_ws_url=input_args["el_ws_url"],
+        cl_rpc_url=input_args["cl_rpc_url"],
+        priv_key=input_args["priv_key"],
+    )
+
+
 def input_parser(plan, input_args):
     sanity_check.sanity_check(plan, input_args)
     results = parse_network_params(plan, input_args)
diff --git a/src/package_io/sanity_check.star b/src/package_io/sanity_check.star
index 3055cd64..e1445326 100644
--- a/src/package_io/sanity_check.star
+++ b/src/package_io/sanity_check.star
@@ -66,6 +66,16 @@ ROOT_PARAMS = [
 ]
 
 
+EXTERNAL_L1_NETWORK_PARAMS = [
+    "network_id",
+    "rpc_kind",
+    "el_rpc_url",
+    "el_ws_url",
+    "cl_rpc_url",
+    "priv_key",
+]
+
+
 def deep_validate_params(plan, input_args, category, allowed_params):
     if category in input_args:
         for item in input_args[category]:
@@ -149,3 +159,13 @@ def sanity_check(plan, optimism_config):
         )
 
     plan.print("Sanity check for OP package passed")
+
+
+def external_l1_network_params_input_parser(plan, external_l1_network_params):
+    for key in external_l1_network_params.keys():
+        if key not in EXTERNAL_L1_NETWORK_PARAMS:
+            fail(
+                "Invalid parameter {0}, allowed fields: {1}".format(
+                    key, EXTERNAL_L1_NETWORK_PARAMS
+                )
+            )