diff --git a/.github/workflows/build_centos7.yml b/.github/workflows/build_centos7.yml
index 3cf271ca3..32c86126b 100644
--- a/.github/workflows/build_centos7.yml
+++ b/.github/workflows/build_centos7.yml
@@ -6,6 +6,7 @@ on:
     branches:
       - develop
       - dependabot/*
+      - release/*
   pull_request:
   release:
     types: [ created ]
@@ -107,14 +108,6 @@ jobs:
         with:
           cmake-version: '3.28.x'
 
-      #Lukka's action doesn't work on runner.
-      #jwlawson's action doesn't work in ACT
-      #I left this here to quicly switch between one or the other
-      #      - uses: lukka/get-cmake@latest
-      #        with:
-      #          useLocalCache: false
-      #          useCloudCache: true
-
       - name: Checkout xpressmp linux
         uses: actions/checkout@v3 #keep v3
         with:
@@ -132,18 +125,12 @@ jobs:
           os: centos7
           os-full-name: CentOS-7.9.2009
       
-      - name: openmpi-devel
+      - name: repo update
         run: |
           yum update
           sed -i s/mirror.centos.org/vault.centos.org/g /etc/yum.repos.d/*.repo
           sed -i s/^#.*baseurl=http/baseurl=http/g /etc/yum.repos.d/*.repo
           sed -i s/^mirrorlist=http/#mirrorlist=http/g /etc/yum.repos.d/*.repo
-          yum install -y openmpi-devel 
-      
-      - name: Compile Boost
-        uses: ./.github/workflows/compile-boost
-        with:
-          prefix: "${GITHUB_WORKSPACE}/deps"
       
       - name: Install dependencies
         run: |
@@ -175,8 +162,6 @@ jobs:
       - name: Configure
         run: |
           source /opt/rh/devtoolset-10/enable
-          export LD_LIBRARY_PATH=/usr/lib64/openmpi/lib:$LD_LIBRARY_PATH
-          export PATH=/usr/lib64/openmpi/bin:$PATH
           cmake -B _build -S . \
                  -DBUILD_TESTING=ON \
                  -DCMAKE_PREFIX_PATH=${GITHUB_WORKSPACE}/deps \
@@ -202,8 +187,8 @@ jobs:
         timeout-minutes: 120
         shell: bash
         run: |
-          export LD_LIBRARY_PATH=/usr/lib64/openmpi/lib:$LD_LIBRARY_PATH
-          export PATH=/usr/lib64/openmpi/bin:${{ env.XPRS_LIB_Path_CONTAINER }}:$PATH
+          export PATH=${GITHUB_WORKSPACE}/_build/vcpkg_installed/x64-linux/tools/openmpi/bin/:$PATH
+          export LD_LIBRARY_PATH=LD_LIBRARY_PATH:${{ env.XPRS_LIB_Path_CONTAINER }}
           export XPRESS=${{ env.XPRESS_CONTAINER }}
           cd _build
           ctest -C Release --output-on-failure -L "unit|benders|lpnamer|medium"
diff --git a/.github/workflows/build_oracle8.yml b/.github/workflows/build_oracle8.yml
index eebc42ceb..ab5eba027 100644
--- a/.github/workflows/build_oracle8.yml
+++ b/.github/workflows/build_oracle8.yml
@@ -6,6 +6,7 @@ on:
     branches:
       - develop
       - dependabot/*
+      - release/*
   pull_request:
   release:
     types: [ created ]
@@ -62,12 +63,11 @@ jobs:
     steps:
       - name: Install System
         run: |
-          dnf install -y epel-release git wget rpm-build redhat-lsb-core openmpi-devel
+          dnf install -y epel-release git wget rpm-build redhat-lsb-core
           dnf install -y unzip libuuid-devel gcc-toolset-10-toolchain python3-devel zlib-devel
           #make gcc &co available system wide and "action wide"
           source /opt/rh/gcc-toolset-10/enable
           echo $PATH >> $GITHUB_PATH
-      
 
       - run: |
           dnf module install -y nodejs:20/common
@@ -80,11 +80,6 @@ jobs:
       - uses: actions/checkout@v4
         with:
           submodules: true
-
-      - name: Compile Boost
-        uses: ./.github/workflows/compile-boost
-        with:
-          prefix: "${GITHUB_WORKSPACE}/deps"          
           
       - name: Checkout xpressmp linux
         uses: actions/checkout@v4
@@ -132,8 +127,6 @@ jobs:
 
       - name: Configure
         run: |
-          export LD_LIBRARY_PATH=/usr/lib64/openmpi/lib:$LD_LIBRARY_PATH
-          export PATH=/usr/lib64/openmpi/bin:$PATH
           cmake -B _build -S . \
                  -DBUILD_TESTING=ON \
                  -DCMAKE_BUILD_TYPE=Release \
@@ -151,8 +144,8 @@ jobs:
         timeout-minutes: 120
         shell: bash
         run: |
-          export PATH=/usr/lib64/openmpi/bin:$PATH
-          export LD_LIBRARY_PATH=/usr/lib64/openmpi/lib:${{ env.XPRS_LIB_Path_CONTAINER }}:$LD_LIBRARY_PATH
+          export PATH=${GITHUB_WORKSPACE}/_build/vcpkg_installed/x64-linux/tools/openmpi/bin/:$PATH
+          export LD_LIBRARY_PATH=LD_LIBRARY_PATH:${{ env.XPRS_LIB_Path_CONTAINER }}
           export XPRESS=${{ env.XPRESS_CONTAINER }}
           cd _build
           ctest -C Release --output-on-failure -L "unit|benders|lpnamer|medium"
diff --git a/.github/workflows/build_ubuntu.yml b/.github/workflows/build_ubuntu.yml
index ed28fbed6..972cc832c 100644
--- a/.github/workflows/build_ubuntu.yml
+++ b/.github/workflows/build_ubuntu.yml
@@ -7,6 +7,7 @@ on:
       - main
       - develop
       - dependabot/*
+      - release/*
   pull_request:
   release:
     types: [ created ]
@@ -55,7 +56,6 @@ jobs:
           sudo apt-get update --fix-missing
           sudo apt-get install -y ccache
           sudo apt-get install -y g++-10 gcc-10
-          sudo apt-get install -y libopenmpi-dev
       
 
       - name: ccache
@@ -85,11 +85,6 @@ jobs:
           sudo update-alternatives --install /usr/bin/c++ c++ /usr/bin/g++ 30
           sudo update-alternatives --set c++ /usr/bin/g++
 
-      - name: Compile Boost
-        uses: ./.github/workflows/compile-boost
-        with:
-          prefix: "${GITHUB_WORKSPACE}/deps"          
-          
       - uses: lukka/get-cmake@latest
         with:
           useLocalCache: false
@@ -153,7 +148,7 @@ jobs:
 
       - name: Test
         run: |
-          export PATH=${GITHUB_WORKSPACE}/_build/vcpkg_installed/x64-linux/tools/openmpi/bin/:$PATH
+          export PATH=${GITHUB_WORKSPACE}/_build/vcpkg_installed/x64-linux/tools/openmpi/bin:$PATH
           cd _build
           ctest -C Release --output-on-failure -L "medium|unit|benders|lpnamer"
 
diff --git a/.github/workflows/build_windows.yml b/.github/workflows/build_windows.yml
index 9125419af..629c87135 100644
--- a/.github/workflows/build_windows.yml
+++ b/.github/workflows/build_windows.yml
@@ -7,6 +7,7 @@ on:
       - main
       - develop
       - dependabot/*
+      - release/*
   pull_request:
   release:
     types: [ created ]
diff --git a/.github/workflows/compile-boost/action.yml b/.github/workflows/compile-boost/action.yml
deleted file mode 100644
index c8f9bbe88..000000000
--- a/.github/workflows/compile-boost/action.yml
+++ /dev/null
@@ -1,21 +0,0 @@
-name: "Download and compile boost"
-description: "Download and compile boost"
-inputs:
-  prefix:
-    description: 'extra qualifiers'
-    required: true
-runs:
-  using: "composite"
-  steps: 
-  - id: install-boost
-    shell: bash
-    run: |
-      source /opt/rh/gcc-toolset-10/enable || true
-      export LD_LIBRARY_PATH=/usr/lib64/openmpi/lib:$LD_LIBRARY_PATH
-      export PATH=/usr/lib64/openmpi/bin:$PATH
-      wget https://github.com/boostorg/boost/releases/download/boost-1.81.0/boost-1.81.0.tar.gz
-      tar xvf boost-1.81.0.tar.gz
-      cd boost-1.81.0
-      ./bootstrap.sh --prefix=${{inputs.prefix}}/ --with-libraries=serialization,program_options,mpi
-      echo "using mpi ;" >> project-config.jam
-      ./b2 install
diff --git a/.github/workflows/download-extract-precompiled-libraries-tgz/action.yml b/.github/workflows/download-extract-precompiled-libraries-tgz/action.yml
index 43e23e7f8..8442deff3 100644
--- a/.github/workflows/download-extract-precompiled-libraries-tgz/action.yml
+++ b/.github/workflows/download-extract-precompiled-libraries-tgz/action.yml
@@ -24,8 +24,6 @@ runs:
     - id: download-extract
       shell: bash
       run: |
-        export LD_LIBRARY_PATH=/usr/lib64/openmpi/lib:$LD_LIBRARY_PATH
-        export PATH=/usr/lib64/openmpi/bin:$PATH
         mkdir -p deps
         wget https://github.com/AntaresSimulatorTeam/Antares_Simulator/releases/download/v${{inputs.antares-version}}/antares-${{inputs.antares-version}}-${{inputs.os-full-name}}${{inputs.variant}}.tar.gz
         tar -xvf antares-${{inputs.antares-version}}-${{inputs.os-full-name}}${{inputs.variant}}.tar.gz -C deps --strip-components=1
diff --git a/.github/workflows/sonarcloud.yml b/.github/workflows/sonarcloud.yml
index c0b650361..f3b7d4d66 100644
--- a/.github/workflows/sonarcloud.yml
+++ b/.github/workflows/sonarcloud.yml
@@ -65,12 +65,7 @@ jobs:
           sudo update-alternatives --install /usr/bin/cc cc /usr/bin/gcc 30
           sudo update-alternatives --set cc /usr/bin/gcc
           sudo update-alternatives --install /usr/bin/c++ c++ /usr/bin/g++ 30
-          sudo update-alternatives --set c++ /usr/bin/g++
-      
-      - name: Compile Boost
-        uses: ./.github/workflows/compile-boost
-        with:
-          prefix: "${GITHUB_WORKSPACE}/deps"     
+          sudo update-alternatives --set c++ /usr/bin/g++ 
       
       - name: Read antares-solver version
         id: antares-version
diff --git a/requirements.txt b/requirements.txt
index 7b019ee7f..c5ff70d62 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,5 +1,6 @@
 wheel
-pyinstaller>=4.3
+pyinstaller==4.5.1; platform_system=='Linux' #Version 6 cause issue when packaging mpi see #882
+pyinstaller>=4.5.1; platform_system=='Windows' #Issues with 4.5 on Windows. Proper condition should be on python version
 pyyaml
 dataclasses
 psutil==5.8.0
diff --git a/vcpkg.json b/vcpkg.json
index c3aa8babb..93b39d712 100644
--- a/vcpkg.json
+++ b/vcpkg.json
@@ -14,18 +14,15 @@
     "coin-or-cbc",
     {
       "name": "boost-mpi",
-      "version>=": "1.81.0",
-      "platform": "windows"
+      "version>=": "1.81.0"
     },
     {
       "name": "boost-program-options",
-      "version>=": "1.81.0",
-      "platform": "windows"
+      "version>=": "1.81.0"
     },
     {
       "name": "boost-algorithm",
-      "version>=": "1.81.0",
-      "platform": "windows"
+      "version>=": "1.81.0"
     },
     "yaml-cpp",
     {