diff --git a/.github/scripts/integration-test-node.sh b/.github/scripts/integration-test-node.sh
index b7f00c65620..0d070b8001d 100755
--- a/.github/scripts/integration-test-node.sh
+++ b/.github/scripts/integration-test-node.sh
@@ -1,5 +1,5 @@
 #!/bin/bash
 set -eu
 
-apt-get install libc++-dev -y
+apt-get install libc6 libstdc++6 -y
 yarn workspace integration-tests test:node
diff --git a/.github/workflows/reports.yml b/.github/workflows/reports.yml
index d458f8998f0..80f1910e310 100644
--- a/.github/workflows/reports.yml
+++ b/.github/workflows/reports.yml
@@ -58,7 +58,7 @@ jobs:
   compare_gates_reports:
     name: Circuit sizes
     needs: [build-nargo]
-    runs-on: ubuntu-22.04
+    runs-on: ubuntu-24.04
     permissions:
       pull-requests: write
 
diff --git a/.github/workflows/test-js-packages.yml b/.github/workflows/test-js-packages.yml
index 981d97e1bdf..690575076c7 100644
--- a/.github/workflows/test-js-packages.yml
+++ b/.github/workflows/test-js-packages.yml
@@ -394,7 +394,7 @@ jobs:
 
   test-integration-node:
     name: Integration Tests (Node)
-    runs-on: ubuntu-22.04
+    runs-on: ubuntu-24.04
     needs: [build-acvm-js, build-noir-wasm, build-nargo, build-noirc-abi]
     timeout-minutes: 30
 
@@ -406,6 +406,7 @@ jobs:
         run: |
           ./scripts/install_bb.sh
           echo "$HOME/.bb/" >> $GITHUB_PATH
+          sudo apt-get install libc6 libstdc++6 -y
 
       - name: Download nargo binary
         uses: ./.github/actions/download-nargo
@@ -489,7 +490,7 @@ jobs:
 
   test-examples:
     name: Example scripts
-    runs-on: ubuntu-22.04
+    runs-on: ubuntu-24.04
     needs: [build-nargo, build-noir-execute]
     timeout-minutes: 30
 
@@ -506,6 +507,7 @@ jobs:
         run: |
           ./scripts/install_bb.sh
           echo "$HOME/.bb/" >> $GITHUB_PATH
+          sudo apt-get install libc6 libstdc++6 -y
 
       - name: Download nargo binary
         uses: ./.github/actions/download-nargo
diff --git a/compiler/integration-tests/package.json b/compiler/integration-tests/package.json
index 053e9efeed2..6752a2daa6e 100644
--- a/compiler/integration-tests/package.json
+++ b/compiler/integration-tests/package.json
@@ -13,7 +13,7 @@
     "lint": "NODE_NO_WARNINGS=1 eslint . --ext .ts --ignore-path ./.eslintignore  --max-warnings 0"
   },
   "dependencies": {
-    "@aztec/bb.js": "0.72.1",
+    "@aztec/bb.js": "0.77.0",
     "@noir-lang/noir_js": "workspace:*",
     "@noir-lang/noir_wasm": "workspace:*",
     "@nomicfoundation/hardhat-chai-matchers": "^2.0.0",
diff --git a/compiler/integration-tests/scripts/codegen-verifiers.sh b/compiler/integration-tests/scripts/codegen-verifiers.sh
index de1f71a4cc0..f1fc321d1ff 100755
--- a/compiler/integration-tests/scripts/codegen-verifiers.sh
+++ b/compiler/integration-tests/scripts/codegen-verifiers.sh
@@ -17,19 +17,19 @@ KEYS=$(mktemp -d)
 # Codegen verifier contract for 1_mul
 mul_dir=$repo_root/test_programs/execution_success/1_mul
 nargo --program-dir $mul_dir compile
-$NARGO_BACKEND_PATH write_vk -b $mul_dir/target/1_mul.json -o $KEYS/1_mul
-$NARGO_BACKEND_PATH contract -k $KEYS/1_mul -o $contracts_dir/1_mul.sol
+$NARGO_BACKEND_PATH OLD_API write_vk -b $mul_dir/target/1_mul.json -o $KEYS/1_mul
+$NARGO_BACKEND_PATH OLD_API contract -k $KEYS/1_mul -o $contracts_dir/1_mul.sol
 
 # Codegen verifier contract for assert_statement
 assert_statement_dir=$repo_root/test_programs/execution_success/assert_statement
 nargo --program-dir $assert_statement_dir compile
-$NARGO_BACKEND_PATH write_vk -b $assert_statement_dir/target/assert_statement.json -o $KEYS/assert_statement
-$NARGO_BACKEND_PATH contract -k $KEYS/assert_statement -o $contracts_dir/assert_statement.sol
+$NARGO_BACKEND_PATH OLD_API write_vk -b $assert_statement_dir/target/assert_statement.json -o $KEYS/assert_statement
+$NARGO_BACKEND_PATH OLD_API contract -k $KEYS/assert_statement -o $contracts_dir/assert_statement.sol
 
 # Codegen verifier contract for recursion
 recursion_dir=$repo_root/compiler/integration-tests/circuits/recursion
 nargo --program-dir $recursion_dir compile
-$NARGO_BACKEND_PATH write_vk -b $recursion_dir/target/recursion.json -o $KEYS/recursion
-$NARGO_BACKEND_PATH contract -k $KEYS/recursion ./ -o $contracts_dir/recursion.sol
+$NARGO_BACKEND_PATH OLD_API write_vk -b $recursion_dir/target/recursion.json -o $KEYS/recursion
+$NARGO_BACKEND_PATH OLD_API contract -k $KEYS/recursion -o $contracts_dir/recursion.sol
 
-rm -rf $KEYS
\ No newline at end of file
+rm -rf $KEYS
diff --git a/examples/codegen_verifier/codegen_verifier.sh b/examples/codegen_verifier/codegen_verifier.sh
index c792b418311..89df3ced181 100755
--- a/examples/codegen_verifier/codegen_verifier.sh
+++ b/examples/codegen_verifier/codegen_verifier.sh
@@ -6,18 +6,18 @@ BACKEND=${BACKEND:-bb}
 nargo compile
 
 # TODO: backend should automatically generate vk if necessary.
-$BACKEND write_vk -b ./target/hello_world.json
-$BACKEND contract -o ./src/contract.sol
+$BACKEND OLD_API write_vk -b ./target/hello_world.json
+$BACKEND OLD_API contract -o ./src/contract.sol
 
 # We now generate a proof and check whether the verifier contract will verify it.
 
 nargo execute --pedantic-solving witness
 
 PROOF_PATH=./target/proof
-$BACKEND prove -b ./target/hello_world.json -w ./target/witness.gz -o $PROOF_PATH
+$BACKEND OLD_API prove -b ./target/hello_world.json -w ./target/witness.gz -o $PROOF_PATH
 
 # Sanity check that proof is valid.
-$BACKEND verify -k ./target/vk -p ./target/proof
+$BACKEND OLD_API verify -k ./target/vk -p ./target/proof
 
 NUM_PUBLIC_INPUTS=2
 PUBLIC_INPUT_BYTES=$((32 * $NUM_PUBLIC_INPUTS))
@@ -25,15 +25,15 @@ HEX_PUBLIC_INPUTS=$(head -c $PUBLIC_INPUT_BYTES $PROOF_PATH | od -An -v -t x1 |
 HEX_PROOF=$(tail -c +$(($PUBLIC_INPUT_BYTES + 1)) $PROOF_PATH | od -An -v -t x1 | tr -d $' \n')
 
 # Split public inputs into strings where each string represents a `bytes32`.
-SPLIT_HEX_PUBLIC_INPUTS=$(sed -e 's/.\{64\}/0x&,/g' <<< $HEX_PUBLIC_INPUTS)
+SPLIT_HEX_PUBLIC_INPUTS=$(sed -e 's/.\{64\}/0x&,/g' <<<$HEX_PUBLIC_INPUTS)
 
 # Spin up an anvil node to deploy the contract to
 anvil &
 
 DEPLOY_INFO=$(forge create UltraVerifier \
-    --rpc-url "127.0.0.1:8545" \
-    --private-key "0xac0974bec39a17e36ba4a6b4d238ff944bacb478cbed5efcae784d7bf4f2ff80" \
-    --json)
+  --rpc-url "127.0.0.1:8545" \
+  --private-key "0xac0974bec39a17e36ba4a6b4d238ff944bacb478cbed5efcae784d7bf4f2ff80" \
+  --json)
 VERIFIER_ADDRESS=$(echo $DEPLOY_INFO | jq -r '.deployedTo')
 
 # Call the verifier contract with our proof.
diff --git a/examples/prove_and_verify/prove_and_verify.sh b/examples/prove_and_verify/prove_and_verify.sh
index 411f5258caf..92288bc92e0 100755
--- a/examples/prove_and_verify/prove_and_verify.sh
+++ b/examples/prove_and_verify/prove_and_verify.sh
@@ -7,8 +7,8 @@ nargo execute --pedantic-solving witness
 
 # TODO: `bb` should create `proofs` directory if it doesn't exist.
 mkdir -p proofs
-$BACKEND prove -b ./target/hello_world.json -w ./target/witness.gz
+$BACKEND OLD_API prove -b ./target/hello_world.json -w ./target/witness.gz
 
 # TODO: backend should automatically generate vk if necessary.
-$BACKEND write_vk -b ./target/hello_world.json
-$BACKEND verify -k ./target/vk -p ./proofs/proof
+$BACKEND OLD_API write_vk -b ./target/hello_world.json
+$BACKEND OLD_API verify -k ./target/vk -p ./proofs/proof
diff --git a/examples/recursion/generate_recursive_proof.sh b/examples/recursion/generate_recursive_proof.sh
index 09b01d547b6..e05dd854d69 100755
--- a/examples/recursion/generate_recursive_proof.sh
+++ b/examples/recursion/generate_recursive_proof.sh
@@ -4,16 +4,16 @@ set -eu
 BACKEND=${BACKEND:-bb}
 
 nargo execute sum_witness --package sum
-$BACKEND prove -b ./target/sum.json -w ./target/sum_witness.gz -o ./target/sum_proof --recursive
+$BACKEND OLD_API prove -b ./target/sum.json -w ./target/sum_witness.gz -o ./target/sum_proof --recursive
 
 # Once we have generated our inner proof, we must use this to generate inputs to `recurse_leaf``
 
-$BACKEND write_vk -b ./target/sum.json -o ./target/sum_key --recursive
-$BACKEND vk_as_fields -k ./target/sum_key -o ./target/sum_vk_as_fields
+$BACKEND OLD_API write_vk -b ./target/sum.json -o ./target/sum_key --recursive
+$BACKEND OLD_API vk_as_fields -k ./target/sum_key -o ./target/sum_vk_as_fields
 VK_HASH=$(jq -r '.[0]' ./target/sum_vk_as_fields)
 VK_AS_FIELDS=$(jq -r '.[1:]' ./target/sum_vk_as_fields)
 
-FULL_PROOF_AS_FIELDS="$($BACKEND proof_as_fields -p ./target/sum_proof -k ./target/sum_key -o -)"
+FULL_PROOF_AS_FIELDS="$($BACKEND OLD_API proof_as_fields -p ./target/sum_proof -k ./target/sum_key -o -)"
 # sum has 3 public inputs
 PUBLIC_INPUTS=$(echo $FULL_PROOF_AS_FIELDS | jq -r '.[:3]')
 PROOF_AS_FIELDS=$(echo $FULL_PROOF_AS_FIELDS | jq -r '.[3:]')
@@ -28,19 +28,19 @@ echo "public_inputs = $PUBLIC_INPUTS" >> $RECURSE_LEAF_PROVER_TOML
 # We can now execute and prove `recurse_leaf`
 
 nargo execute recurse_leaf_witness --package recurse_leaf
-$BACKEND prove -b ./target/recurse_leaf.json -w ./target/recurse_leaf_witness.gz -o ./target/recurse_leaf_proof --recursive
+$BACKEND OLD_API prove -b ./target/recurse_leaf.json -w ./target/recurse_leaf_witness.gz -o ./target/recurse_leaf_proof --recursive
 
 # Let's do a sanity check that the proof we've generated so far is valid.
-$BACKEND write_vk -b ./target/recurse_leaf.json -o ./target/recurse_leaf_key --recursive
-$BACKEND verify -p ./target/recurse_leaf_proof -k ./target/recurse_leaf_key
+$BACKEND OLD_API write_vk -b ./target/recurse_leaf.json -o ./target/recurse_leaf_key --recursive
+$BACKEND OLD_API verify -p ./target/recurse_leaf_proof -k ./target/recurse_leaf_key
 
 # Now we generate the final `recurse_node` proof similarly to how we did for `recurse_leaf`.
 
-$BACKEND vk_as_fields -k ./target/recurse_leaf_key -o ./target/recurse_leaf_vk_as_fields
+$BACKEND OLD_API vk_as_fields -k ./target/recurse_leaf_key -o ./target/recurse_leaf_vk_as_fields
 VK_HASH=$(jq -r '.[0]' ./target/recurse_leaf_vk_as_fields)
 VK_AS_FIELDS=$(jq -r '.[1:]' ./target/recurse_leaf_vk_as_fields)
 
-FULL_PROOF_AS_FIELDS="$($BACKEND proof_as_fields -p ./target/recurse_leaf_proof -k ./target/recurse_leaf_key -o -)"
+FULL_PROOF_AS_FIELDS="$($BACKEND OLD_API proof_as_fields -p ./target/recurse_leaf_proof -k ./target/recurse_leaf_key -o -)"
 # recurse_leaf has 4 public inputs (excluding aggregation object)
 PUBLIC_INPUTS=$(echo $FULL_PROOF_AS_FIELDS | jq -r '.[:4]')
 PROOF_AS_FIELDS=$(echo $FULL_PROOF_AS_FIELDS | jq -r '.[4:]')
@@ -54,8 +54,8 @@ echo "public_inputs = $PUBLIC_INPUTS" >> $RECURSE_NODE_PROVER_TOML
 # We can now execute and prove `recurse_node`
 
 nargo execute recurse_node_witness --package recurse_node
-$BACKEND prove -b ./target/recurse_node.json -w ./target/recurse_node_witness.gz -o ./target/recurse_node_proof
+$BACKEND OLD_API prove -b ./target/recurse_node.json -w ./target/recurse_node_witness.gz -o ./target/recurse_node_proof
 
 # We finally verify that the generated recursive proof is valid.
-$BACKEND write_vk -b ./target/recurse_node.json -o ./target/recurse_node_key
-$BACKEND verify -p ./target/recurse_node_proof -k ./target/recurse_node_key
+$BACKEND OLD_API write_vk -b ./target/recurse_node.json -o ./target/recurse_node_key
+$BACKEND OLD_API verify -p ./target/recurse_node_proof -k ./target/recurse_node_key
diff --git a/scripts/install_bb.sh b/scripts/install_bb.sh
index 72170af78d8..4579c3a2e67 100755
--- a/scripts/install_bb.sh
+++ b/scripts/install_bb.sh
@@ -1,11 +1,11 @@
 #!/bin/bash
 
-VERSION="0.72.1"
+VERSION="0.77.0"
 
 BBUP_PATH=~/.bb/bbup
 
 if ! [ -f $BBUP_PATH ]; then 
-    curl -L https://raw.githubusercontent.com/AztecProtocol/aztec-packages/master/barretenberg/cpp/installation/install | bash
+    curl -L https://bbup.aztec.network | bash
 fi
 
 $BBUP_PATH -v $VERSION
diff --git a/yarn.lock b/yarn.lock
index 568e7e487d1..894a70c49eb 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -221,9 +221,9 @@ __metadata:
   languageName: node
   linkType: hard
 
-"@aztec/bb.js@npm:0.72.1":
-  version: 0.72.1
-  resolution: "@aztec/bb.js@npm:0.72.1"
+"@aztec/bb.js@npm:0.77.0":
+  version: 0.77.0
+  resolution: "@aztec/bb.js@npm:0.77.0"
   dependencies:
     comlink: ^4.4.1
     commander: ^12.1.0
@@ -233,7 +233,7 @@ __metadata:
     tslib: ^2.4.0
   bin:
     bb.js: dest/node/main.js
-  checksum: 143f0062a31e262ceff6e454d31e2a2672afd8dcbff0dafb17d5308f8c5312048e5d3503d80e7ad9ff4b17b6c3d36e8ffbff8d2deda2cdb684f19fa64d5a04ab
+  checksum: d3ffe7c9928f4b98aa3619d1dc0c217a0f1a293045f3fab8d43e25d7dfa397b3ec9770f1e18503798d40bddc8fbd189136c7884574410d4b7e19ee0df1bcb5f6
   languageName: node
   linkType: hard
 
@@ -16609,7 +16609,7 @@ __metadata:
   version: 0.0.0-use.local
   resolution: "integration-tests@workspace:compiler/integration-tests"
   dependencies:
-    "@aztec/bb.js": 0.72.1
+    "@aztec/bb.js": 0.77.0
     "@noir-lang/noir_js": "workspace:*"
     "@noir-lang/noir_wasm": "workspace:*"
     "@nomicfoundation/hardhat-chai-matchers": ^2.0.0