diff --git a/.github/ci_scripts/github_linux_basic b/.github/ci_scripts/github_linux_basic
index e5714a1b4..a884b34d5 100644
--- a/.github/ci_scripts/github_linux_basic
+++ b/.github/ci_scripts/github_linux_basic
@@ -10,14 +10,14 @@ ISSM_CONFIG='\
 	--with-numthreads=4 \
 	--with-matlab-dir=${MATLAB_PATH} \
 	--with-fortran-lib="-L/usr/lib/x86_64-linux-gnu -lgfortran" \
-	--with-mpi-include=${ISSM_DIR}/externalpackages/petsc/install/include \
-	--with-mpi-libflags="-L${ISSM_DIR}/externalpackages/petsc/install/lib -lmpi -lmpicxx -lmpifort" \
-	--with-blas-lapack-dir=${ISSM_DIR}/externalpackages/petsc/install \
-	--with-metis-dir=${ISSM_DIR}/externalpackages/petsc/install \
-	--with-parmetis-dir=${ISSM_DIR}/externalpackages/petsc/install \
-	--with-scalapack-dir=${ISSM_DIR}/externalpackages/petsc/install \
-	--with-mumps-dir=${ISSM_DIR}/externalpackages/petsc/install \
-	--with-petsc-dir=${ISSM_DIR}/externalpackages/petsc/install \
+	--with-mpi-include="-I/usr/lib/x86_64-linux-gnu/openmpi/include/" \
+	--with-mpi-libflags="-L/usr/lib/x86_64-linux-gnu/openmpi/lib -lmpi" \
+	--with-petsc-dir="/usr/lib/petscdir/petsc-real/" \
+	--with-blas-lapack-dir="/usr/lib/petscdir/petsc-real/" \
+	--with-metis-dir="/usr/lib/petscdir/petsc-real/" \
+	--with-parmetis-dir="/usr/lib/petscdir/petsc-real/" \
+	--with-scalapack-dir="/usr/lib/petscdir/petsc-real/" \
+	--with-mumps-dir="/usr/lib/petscdir/petsc-real/" \
 	--with-triangle-dir=${ISSM_DIR}/externalpackages/triangle/install \
 	--with-m1qn3-dir=${ISSM_DIR}/externalpackages/m1qn3/install \
 	--with-semic-dir=${ISSM_DIR}/externalpackages/semic/install \
@@ -28,10 +28,10 @@ ISSM_CONFIG='\
 #-------------------#
 #
 #autotools install-linux.sh
+#cmake     install.sh
+#petsc     install-3.21-linux.sh
 
 EXTERNALPACKAGES="
-	cmake     install.sh
-	petsc     install-3.21-linux.sh
 	triangle  install-linux.sh
 	m1qn3     install-linux.sh
 	semic     install.sh
diff --git a/.github/workflows/c-cpp.yml b/.github/workflows/c-cpp.yml
index edf8437c7..731f48a6d 100644
--- a/.github/workflows/c-cpp.yml
+++ b/.github/workflows/c-cpp.yml
@@ -21,18 +21,9 @@ jobs:
       with:
         release: R2023b
         
-    - name: Print MATLAB root folder directly
-      run: echo ${{ steps.setup-matlab.outputs.matlabroot }}
-
-    - name: Check CMAKE
-      run: which cmake
-      
     - name: Install PETSc
       run: sudo apt-get install -y petsc-dev
 
-    - name: Find PETSc lib
-      run: ls /usr/lib/x86_64-linux-gnu/
-
     - name: compile ISSM on linux basic
       env:
         MATLAB_PATH: ${{ steps.setup-matlab.outputs.matlabroot }}