diff --git a/test-network-nano-bash/peer1.sh b/test-network-nano-bash/peer1.sh
index 89d5d8da..9a76537c 100755
--- a/test-network-nano-bash/peer1.sh
+++ b/test-network-nano-bash/peer1.sh
@@ -11,6 +11,13 @@ fi
 export PATH="${PWD}"/../../fabric/build/bin:"${PWD}"/../bin:"$PATH"
 export FABRIC_CFG_PATH="${PWD}"/../config
 
+# if the fabric build directory exists with external builders in it.. use that
+if [ -d ${PWD}/../../fabric/build/bin/ext_ccs_builder/ ]; then
+  export CORE_CHAINCODE_EXTERNALBUILDERS: "[{name: ext_ccs_builder, path: ${PWD}/../../fabric/build/bin/ext_ccs_builder/}]"
+else 
+  export CORE_CHAINCODE_EXTERNALBUILDERS: "[{name: ext_ccs_builder, path: ${PWD}/../bin/ext_ccs_builder/}]"
+fi
+
 export FABRIC_LOGGING_SPEC=debug:cauthdsl,policies,msp,grpc,peer.gossip.mcs,gossip,leveldbhelper=info
 export CORE_PEER_TLS_ENABLED=true
 export CORE_PEER_TLS_CERT_FILE="${PWD}"/crypto-config/peerOrganizations/org1.example.com/peers/peer0.org1.example.com/tls/server.crt
diff --git a/test-network-nano-bash/peer2.sh b/test-network-nano-bash/peer2.sh
index 163df06e..6f110719 100755
--- a/test-network-nano-bash/peer2.sh
+++ b/test-network-nano-bash/peer2.sh
@@ -10,7 +10,12 @@ fi
 # look for binaries in local dev environment /build/bin directory and then in local samples /bin directory
 export PATH="${PWD}"/../../fabric/build/bin:"${PWD}"/../bin:"$PATH"
 export FABRIC_CFG_PATH="${PWD}"/../config
-
+# if the fabric build directory exists with external builders in it.. use that
+if [ -d ${PWD}/../../fabric/build/bin/ext_ccs_builder/ ]; then
+  export CORE_CHAINCODE_EXTERNALBUILDERS: "[{name: ext_ccs_builder, path: ${PWD}/../../fabric/build/bin/ext_ccs_builder/}]"
+else 
+  export CORE_CHAINCODE_EXTERNALBUILDERS: "[{name: ext_ccs_builder, path: ${PWD}/../bin/ext_ccs_builder/}]"
+fi
 export FABRIC_LOGGING_SPEC=debug:cauthdsl,policies,msp,grpc,peer.gossip.mcs,gossip,leveldbhelper=info
 export CORE_PEER_TLS_ENABLED=true
 export CORE_PEER_TLS_CERT_FILE="${PWD}"/crypto-config/peerOrganizations/org1.example.com/peers/peer1.org1.example.com/tls/server.crt
diff --git a/test-network-nano-bash/peer3.sh b/test-network-nano-bash/peer3.sh
index 1054118f..abb33714 100755
--- a/test-network-nano-bash/peer3.sh
+++ b/test-network-nano-bash/peer3.sh
@@ -11,6 +11,15 @@ fi
 export PATH="${PWD}"/../../fabric/build/bin:"${PWD}"/../bin:"$PATH"
 export FABRIC_CFG_PATH="${PWD}"/../config
 
+
+# if the fabric build directory exists with external builders in it.. use that
+if [ -d ${PWD}/../../fabric/build/bin/ext_ccs_builder/ ]; then
+  export CORE_CHAINCODE_EXTERNALBUILDERS: "[{name: ext_ccs_builder, path: ${PWD}/../../fabric/build/bin/ext_ccs_builder/}]"
+else 
+  export CORE_CHAINCODE_EXTERNALBUILDERS: "[{name: ext_ccs_builder, path: ${PWD}/../bin/ext_ccs_builder/}]"
+fi
+
+
 export FABRIC_LOGGING_SPEC=debug:cauthdsl,policies,msp,grpc,peer.gossip.mcs,gossip,leveldbhelper=info
 export CORE_PEER_TLS_ENABLED=true
 export CORE_PEER_TLS_CERT_FILE="${PWD}"/crypto-config/peerOrganizations/org2.example.com/peers/peer0.org2.example.com/tls/server.crt
diff --git a/test-network-nano-bash/peer4.sh b/test-network-nano-bash/peer4.sh
index a62afe58..6bec80a9 100755
--- a/test-network-nano-bash/peer4.sh
+++ b/test-network-nano-bash/peer4.sh
@@ -11,6 +11,15 @@ fi
 export PATH="${PWD}"/../../fabric/build/bin:"${PWD}"/../bin:"$PATH"
 export FABRIC_CFG_PATH="${PWD}"/../config
 
+
+# if the fabric build directory exists with external builders in it.. use that
+if [ -d ${PWD}/../../fabric/build/bin/ext_ccs_builder/ ]; then
+  export CORE_CHAINCODE_EXTERNALBUILDERS: "[{name: ext_ccs_builder, path: ${PWD}/../../fabric/build/bin/ext_ccs_builder/}]"
+else 
+  export CORE_CHAINCODE_EXTERNALBUILDERS: "[{name: ext_ccs_builder, path: ${PWD}/../bin/ext_ccs_builder/}]"
+fi
+
+
 export FABRIC_LOGGING_SPEC=debug:cauthdsl,policies,msp,grpc,peer.gossip.mcs,gossip,leveldbhelper=info
 export CORE_PEER_TLS_ENABLED=true
 export CORE_PEER_TLS_CERT_FILE="${PWD}"/crypto-config/peerOrganizations/org2.example.com/peers/peer1.org2.example.com/tls/server.crt