rather make use of the package of the distribution instead of resorti…

…ng to pip

.github/workflows/main.yml

@@ -35,10 +35,7 @@ jobs:
           sudo apt-get -y install gfortran gcc g++ cmake liblapack-dev libgomp1
           sudo apt-get -y install mpich libmpich-dev
           sudo apt-get -y install python3-gi python3-gi-cairo gir1.2-gtk-3.0
-          wget https://bootstrap.pypa.io/get-pip.py
-          python3 get-pip.py
-          export PATH=$HOME/.local/bin:$PATH
-          python3 -m pip install numpy scipy matplotlib --user
+          sudo apt-get -y install python3-numpy python3-scipy python3-matplotlib
 
       - name: Run test
         run: |