diff --git a/models/ICON/Singularity.gcc b/models/ICON/Singularity.gcc
index a5e78c821ad5ed3f251a87ab2912b2cb879707da..eb281e4a30812b83904b0c86f6bb4a5cd947b42e 100644
--- a/models/ICON/Singularity.gcc
+++ b/models/ICON/Singularity.gcc
@@ -1,5 +1,5 @@
-Bootstrap: docker
-From: ubuntu:20.04
+BootStrap: localimage
+From: /home/maximilian/ubuntu-mpi.img
 
 %labels
     maintainer IT-IMGW <it.img-wien@univie.ac.at>
@@ -10,11 +10,7 @@ export DEBIAN_FRONTEND=noninteractive
 # Install building tools and ICON dependencies:
 apt update -y \
 && apt install -y \
-  build-essential   \
   python3           \
-  gcc             \
-  gfortran        \
-  libopenmpi-dev    \
   libhdf5-dev       \
   libnetcdf-dev     \
   libnetcdff-dev    \
@@ -23,7 +19,6 @@ apt update -y \
   liblapack-dev     \
   libxml2-dev
 
-
 # Select the compiler:
 #update-alternatives --install /usr/bin/gcc gcc /usr/bin/gcc-6 50 \
 #  --slave /usr/bin/gfortran gfortran /usr/bin/gfortran-6