diff --git a/containers/bootstrap.sh b/containers/bootstrap.sh
index fc18ba9..f9c51c5 100755
--- a/containers/bootstrap.sh
+++ b/containers/bootstrap.sh
@@ -38,6 +38,17 @@ mkdir -p "$LOG_DIR"
 # ── Configure shared bootstrap variables ──
 ANVIL_RPC=${ANVIL_RPC:-"http://anvil:8545"}
 CONTRACT_ENV=$STATE_DIR/contracts.env
+
+# Derive NETWORK_NAME from FORK_URL if not explicitly set.
+# Callers may override by exporting NETWORK_NAME before starting the stack.
+if [[ -z "${NETWORK_NAME:-}" ]]; then
+  _fork_url="${FORK_URL:-}"
+  if [[ "$_fork_url" == *"mainnet"* ]]; then
+    NETWORK_NAME="BASE_MAINNET_LOCAL_FORK"
+  else
+    NETWORK_NAME="BASE_SEPOLIA_LOCAL_FORK"
+  fi
+fi
 LOG_FILE=$SETUP_LOG
 ONCHAIN_DIR=$ROOT_DIR/onchain
 TXNBOT_FUND_VALUE=${TXNBOT_FUND_VALUE:-1ether}
@@ -83,11 +94,11 @@ derive_txnbot_wallet() {
 
 write_ponder_env() {
   cat >"$ROOT_DIR/services/ponder/.env.local" <<EOPONDER
-PONDER_NETWORK=BASE_SEPOLIA_LOCAL_FORK
+PONDER_NETWORK=$NETWORK_NAME
 KRAIKEN_ADDRESS=$KRAIKEN
 STAKE_ADDRESS=$STAKE
 START_BLOCK=$DEPLOY_BLOCK
-PONDER_RPC_URL_BASE_SEPOLIA_LOCAL_FORK=$ANVIL_RPC
+PONDER_RPC_URL_${NETWORK_NAME}=$ANVIL_RPC
 DATABASE_URL=postgresql://ponder:ponder_local@postgres:5432/ponder_local
 DATABASE_SCHEMA=ponder_local_${DEPLOY_BLOCK}
 EOPONDER
@@ -98,7 +109,7 @@ write_txn_bot_env() {
   local provider_url=${TXNBOT_PROVIDER_URL:-$ANVIL_RPC}
   local graphql_endpoint=${TXNBOT_GRAPHQL_ENDPOINT:-http://ponder:42069/graphql}
   cat >"$txnbot_env" <<EOTXNBOT
-ENVIRONMENT=BASE_SEPOLIA_LOCAL_FORK
+ENVIRONMENT=$NETWORK_NAME
 PROVIDER_URL=$provider_url
 PRIVATE_KEY=$TXNBOT_PRIVATE_KEY
 LM_CONTRACT_ADDRESS=$LIQUIDITY_MANAGER