diff --git a/.github/actions/build/action.yml b/.github/actions/build/action.yml
index 7a501b83e0..34c74d4d1c 100644
--- a/.github/actions/build/action.yml
+++ b/.github/actions/build/action.yml
@@ -4,6 +4,12 @@ description: 'All of the building steps for o1js'
 permissions:
   contents: write
 
+inputs:
+  proof_systems_commit:
+    description: 'proof_systems commit to use'
+    required: false
+    default: ''
+
 runs:
   using: "composite"
   steps:
@@ -22,6 +28,16 @@ runs:
       with:
         node-version: '20'
 
+    - name: use proof_systems_commit if provided
+      if: ${{ inputs.proof_systems_commit != '' }}
+      shell: bash
+      run: |
+        git -C src/mina/src/lib/crypto/proof-systems fetch origin ${{ inputs.proof_systems_commit }}
+        git -C src/mina/src/lib/crypto/proof-systems clean -fdx
+        git -C src/mina/src/lib/crypto/proof-systems checkout ${{ inputs.proof_systems_commit }}
+        git -C src/mina/src/lib/crypto/proof-systems clean -fdx
+        git -C src/mina add src/lib/crypto/proof-systems
+
     - name: cache bindings
       uses: actions/cache@v4
       id: bindings-cache
@@ -29,9 +45,9 @@ runs:
         path: |
           src/bindings/compiled
           src/bindings/mina-transaction/gen
-        key: bindings-${{ github.event.pull_request.head.sha || github.sha }}
+        key: bindings-${{ github.event.pull_request.head.sha || github.sha }}-${{ inputs.proof_systems_commit }}
     - name: Build the o1js bindings
-      if: steps.bindings-cache.outputs.cache-hit != 'true'
+      if: ${{ steps.bindings-cache.outputs.cache-hit != 'true' }}
       shell: bash
       run: |
         set -Eeu
@@ -47,13 +63,13 @@ runs:
           dist
         key: ${{ runner.OS }}-node-${{ hashFiles('**/package-lock.json') }}-${{ hashFiles('**/*.ts', '**/*.js') }}
     - name: Build examples
-      if: steps.cache.outputs.cache-hit != 'true'
+      if: ${{ steps.cache.outputs.cache-hit != 'true' }}
       shell: bash
       run: |
         npm ci
         npm run build:examples
     - name: Build o1js clean
-      if: steps.cache.outputs.cache-hit != 'true'
+      if: ${{ steps.cache.outputs.cache-hit != 'true' }}
       shell: bash
       run: |
         rm -fr dist
diff --git a/.github/workflows/checks.yml b/.github/workflows/checks.yml
index 6c345f9355..258fbb2e87 100644
--- a/.github/workflows/checks.yml
+++ b/.github/workflows/checks.yml
@@ -6,8 +6,26 @@ on:
       - develop
       - v1
       - v3
-  pull_request:
-  workflow_dispatch: {}
+  pull_request: {}
+  workflow_dispatch:
+    inputs:
+      proof_systems_commit:
+        description: 'proof_systems commit to use'
+        required: false
+        default: ''
+  workflow_call:
+    inputs:
+      proof_systems_commit:
+        description: 'proof_systems commit to use'
+        required: false
+        type: string
+        default: ''
+      target_repo:
+        required: false
+        type: string
+      target_ref:
+        required: false
+        type: string
 
 concurrency:
   group: ${{ github.workflow }}-${{ github.ref }}
@@ -24,8 +42,14 @@ jobs:
         uses: actions/checkout@v4
         with:
           submodules: recursive
+          repository: ${{ inputs.target_repo || github.repository }}
+          ref: ${{ inputs.target_ref || github.ref }}
       - name: Build
         uses: ./.github/actions/build
+        with:
+          repository: ${{ inputs.target_repo || github.repository }}
+          ref: ${{ inputs.target_ref || github.ref }}
+          proof_systems_commit: ${{ inputs.proof_systems_commit }}
 
   Lint-Format-and-TypoCheck:
     strategy:
@@ -37,6 +61,9 @@ jobs:
     steps:
       - name: Checkout Repository
         uses: actions/checkout@v4
+        with:
+          repository: ${{ inputs.target_repo || github.repository }}
+          ref: ${{ inputs.target_ref || github.ref }}
       - name: Setup Node.JS ${{ matrix.node }}
         uses: actions/setup-node@v4
         with:
@@ -81,12 +108,15 @@ jobs:
 
   Upload-bindings:
     name: upload bindings artifact
+    if: ${{ inputs.proof_systems_commit == '' }}
     needs: [Prepare]
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v4
         with:
           submodules: recursive
+          repository: ${{ inputs.target_repo || github.repository }}
+          ref: ${{ inputs.target_ref || github.ref }}
       - name: upload
         uses: ./.github/actions/upload
         with:
@@ -117,9 +147,15 @@ jobs:
         uses: actions/checkout@v4
         with:
           submodules: recursive
+          repository: ${{ inputs.target_repo || github.repository }}
+          ref: ${{ inputs.target_ref || github.ref }}
 
       - name: build
         uses: ./.github/actions/build
+        with:
+          repository: ${{ inputs.target_repo || github.repository }}
+          ref: ${{ inputs.target_ref || github.ref }}
+          proof_systems_commit: ${{ inputs.proof_systems_commit }}
       - name: Prepare for tests
         run: touch profiling.md
       - name: Execute tests
@@ -146,8 +182,14 @@ jobs:
         uses: actions/checkout@v4
         with:
           submodules: recursive
+          repository: ${{ inputs.target_repo || github.repository }}
+          ref: ${{ inputs.target_ref || github.ref }}
       - name: build
         uses: ./.github/actions/build
+        with:
+          repository: ${{ inputs.target_repo || github.repository }}
+          ref: ${{ inputs.target_ref || github.ref }}
+          proof_systems_commit: ${{ inputs.proof_systems_commit }}
       - name: Count tests
         id: count_tests
         run: |
@@ -279,8 +321,15 @@ jobs:
     steps:
       - name: Checkout repository
         uses: actions/checkout@v4
+        with:
+          repository: ${{ inputs.target_repo || github.repository }}
+          ref: ${{ inputs.target_ref || github.ref }}
       - name: build
         uses: ./.github/actions/build
+        with:
+          repository: ${{ inputs.target_repo || github.repository }}
+          ref: ${{ inputs.target_ref || github.ref }}
+          proof_systems_commit: ${{ inputs.proof_systems_commit }}
       - name: Use shared steps for live testing jobs
         uses: ./.github/actions/live-tests-shared
         with:
@@ -307,8 +356,15 @@ jobs:
     steps:
       - name: Checkout repository
         uses: actions/checkout@v4
+        with:
+          repository: ${{ inputs.target_repo || github.repository }}
+          ref: ${{ inputs.target_ref || github.ref }}
       - name: build
         uses: ./.github/actions/build
+        with:
+          repository: ${{ inputs.target_repo || github.repository }}
+          ref: ${{ inputs.target_ref || github.ref }}
+          proof_systems_commit: ${{ inputs.proof_systems_commit }}
       - name: Use shared steps for live testing jobs
         uses: ./.github/actions/live-tests-shared
         with:
diff --git a/.github/workflows/pull_requests.yml b/.github/workflows/pull_requests.yml
index 4b018f8f53..d7d9385b2f 100644
--- a/.github/workflows/pull_requests.yml
+++ b/.github/workflows/pull_requests.yml
@@ -15,15 +15,20 @@ jobs:
 
   Check-npm-deps:
     name: Check npmDepsHash is correct
-    runs-on: [sdk-self-hosted-linux-amd64-build-system]
+    runs-on: ubuntu-latest
     steps:
-      - name: Set up Nix
-        run: echo "PATH=$PATH:/nix/var/nix/profiles/default/bin" >> $GITHUB_ENV
       - name: Disable smudging
         run: echo "GIT_LFS_SKIP_SMUDGE=1" >> $GITHUB_ENV
       - uses: actions/checkout@v4
         with:
           submodules: recursive
+      - uses: nixbuild/nix-quick-install-action@v30
+        continue-on-error: true
+        with:
+          nix_conf: |
+            keep-env-derivations = true
+            keep-outputs = true
+            require-sigs = false
       - name: fix npmDepsHash
         run: |
           set -Eeu