diff --git a/.github/workflows/ubuntu-pyston.yml b/.github/workflows/ubuntu-pyston.yml
index 62bab8ed5..76a1497b3 100644
--- a/.github/workflows/ubuntu-pyston.yml
+++ b/.github/workflows/ubuntu-pyston.yml
@@ -23,8 +23,15 @@ jobs:
       run: |
         sudo apt-get update -qq && sudo apt-get install -qq liblapack-dev llvm-11 llvm-11-dev
         # sudo /usr/lib/llvm-11/bin/llvm-config --version
-        sudo pyston -m pip install --upgrade pip
+	sudo pyston -m pip install --upgrade pip
         sudo LLVM_CONFIG=/usr/lib/llvm-11/bin/llvm-config  pyston -m pip install llvmlite
+	# Download wheels for heavy packages from mathics-omnibus
+	wget https://github.com/Mathics3/mathics-omnibus/raw/master/docker/src/Pillow-10.0.0-cp310-cp310-manylinux_2_28_x86_64.whl 
+	wget https://github.com/Mathics3/mathics-omnibus/raw/master/docker/src/numpy-1.25.1-cp310-cp310-manylinux_2_17_x86_64.manylinux2014_x86_64.whl
+	wget https://github.com/Mathics3/mathics-omnibus/blob/master/docker/src/scipy-1.10.1-cp310-cp310-manylinux_2_17_x86_64.manylinux2014_x86_64.whl
+	pip install numpy-1.25.1-cp310-cp310-manylinux_2_17_x86_64.manylinux2014_x86_64.whl
+	pip install scipy-1.10.1-cp310-cp310-manylinux_2_17_x86_64.manylinux2014_x86_64.whl
+	pip install Pillow-10.0.0-cp310-cp310-manylinux_2_28_x86_64.whl
     - name: Install Mathics with minimal dependencies
       run: |
         make develop