diff --git a/EESSI-extend-2023.06-easybuild.eb b/EESSI-extend-2023.06-easybuild.eb
index 8e328c3ece..bfe7931c8f 100644
--- a/EESSI-extend-2023.06-easybuild.eb
+++ b/EESSI-extend-2023.06-easybuild.eb
@@ -87,6 +87,16 @@ if (os.getenv("EESSI_CVMFS_INSTALL") ~= nil) then
   end
   eessi_cvmfs_install = true
   easybuild_installpath = os.getenv("EESSI_SOFTWARE_PATH")
+  eessi_accelerator_target = os.getenv("EESSI_ACCELERATOR_TARGET")
+  if (eessi_accelerator_target ~= nil) then
+    cuda_compute_capability = string.match(eessi_accelerator_target, "^nvidia/cc([0-9][0-9])$")
+    if (cuda_compute_capability ~= nil) then
+      easybuild_installpath = pathJoin(easybuild_installpath, 'accel', eessi_accelerator_target)
+      easybuild_cuda_compute_capabilities = cuda_compute_capability:sub(1, 1) ..  "." .. cuda_compute_capability:sub(2, 2)
+    else
+      LmodError("Incorrect value for $EESSI_ACCELERATOR_TARGET: " .. eessi_accelerator_target)
+    end
+  end
 elseif (os.getenv("EESSI_SITE_INSTALL") ~= nil) then
   -- Make sure no other EESSI install environment variables are set
   if ((os.getenv("EESSI_PROJECT_INSTALL") ~= nil) or (os.getenv("EESSI_USER_INSTALL") ~= nil)) then
@@ -146,6 +156,11 @@ setenv ("EASYBUILD_UMASK", "022")
 -- Allow this module to be loaded when running EasyBuild
 setenv ("EASYBUILD_ALLOW_LOADED_MODULES", "EasyBuild,EESSI-extend")
 
+-- Set environment variables if building for CUDA compute capabilities
+if (easybuild_cuda_compute_capabilities ~= nil) then
+  setenv ("EASYBUILD_CUDA_COMPUTE_CAPABILITIES", easybuild_cuda_compute_capabilities)
+end
+
 -- Set all related environment variables if we have project or user installations (including extending MODULEPATH)
 if (user_modulepath ~= nil) then
   -- Use a more restrictive umask for this case
diff --git a/EESSI-install-software.sh b/EESSI-install-software.sh
index 65c43d5ac5..83c06c2184 100755
--- a/EESSI-install-software.sh
+++ b/EESSI-install-software.sh
@@ -229,22 +229,34 @@ if [[ "${EESSI_CVMFS_REPO}" != /cvmfs/dev.eessi.io ]]; then
     ${TOPDIR}/install_scripts.sh --prefix ${EESSI_PREFIX}
 fi
 
+echo ">> Configuring EasyBuild..."
+
+# Make sure EESSI-extend is not loaded, and configure location variables for a
+#   CVMFS installation
+module unload EESSI-extend
+unset EESSI_USER_INSTALL
+unset EESSI_PROJECT_INSTALL
+unset EESSI_SITE_INSTALL
+export EESSI_CVMFS_INSTALL=1
+
+# We now run 'source load_eessi_extend_module.sh' to load or install and load the
+#   EESSI-extend module which sets up all build environment settings.
+# The script requires the EESSI_VERSION given as argument, a couple of
+#   environment variables set (TMPDIR, EB and EASYBUILD_INSTALLPATH) and the
+#   function check_exit_code defined.
+# NOTE 1, the script exits if those variables/functions are undefined.
+# NOTE 2, loading the EESSI-extend module may adjust the value of EASYBUILD_INSTALLPATH,
+#   e.g., to point to the installation directory for accelerators.
+# NOTE 3, we have to set a default for EASYBUILD_INSTALLPATH here in cases the
+#   EESSI-extend module itself needs to be installed.
+export EASYBUILD_INSTALLPATH=${EESSI_PREFIX}/software/${EESSI_OS_TYPE}/${EESSI_SOFTWARE_SUBDIR_OVERRIDE}
+source load_eessi_extend_module.sh ${EESSI_VERSION}
+
 # Install full CUDA SDK and cu* libraries in host_injections
 # Hardcode this for now, see if it works
 # TODO: We should make a nice yaml and loop over all CUDA versions in that yaml to figure out what to install
 # Allow skipping CUDA SDK install in e.g. CI environments
-# The install_cuda... script uses EasyBuild. So, we need to check if we have EB
-# or skip this step.
 echo "Going to install full CUDA SDK and cu* libraries under host_injections if necessary"
-module_avail_out=$TMPDIR/ml.out
-module avail 2>&1 | grep EasyBuild &> ${module_avail_out}
-if [[ $? -eq 0 ]]; then
-    echo_green ">> Found an EasyBuild module"
-else
-    echo_yellow ">> No EasyBuild module found: skipping step to install CUDA (see output in ${module_avail_out})"
-    export skip_cuda_install=True
-fi
-
 temp_install_storage=${TMPDIR}/temp_install_storage
 mkdir -p ${temp_install_storage}
 if [ -z "${skip_cuda_install}" ] || [ ! "${skip_cuda_install}" ]; then
@@ -253,7 +265,7 @@ if [ -z "${skip_cuda_install}" ] || [ ! "${skip_cuda_install}" ]; then
         --accept-cuda-eula \
         --accept-cudnn-eula
 else
-    echo "Skipping installation of CUDA SDK and cu* libraries in host_injections, since the --skip-cuda-install flag was passed OR no EasyBuild module was found"
+    echo "Skipping installation of CUDA SDK and cu* libraries in host_injections, since the --skip-cuda-install flag was passed"
 fi
 
 # Install NVIDIA drivers in host_injections (if they exist)
@@ -263,18 +275,6 @@ if command_exists "nvidia-smi"; then
 fi
 
 
-echo ">> Configuring EasyBuild..."
-
-# Make sure that we use the EESSI_CVMFS_INSTALL
-# Since the path is set when loading EESSI-extend, we reload it to make sure it works - even if it is already loaded
-# Note we need to do this after running install_cuda_and_libraries, since that does installations in the EESSI_SITE_INSTALL 
-unset EESSI_USER_INSTALL
-unset EESSI_PROJECT_INSTALL
-unset EESSI_SITE_INSTALL
-export EESSI_CVMFS_INSTALL=1
-module unload EESSI-extend
-module load EESSI-extend/${EESSI_VERSION}-easybuild
-
 if [ ! -z "${shared_fs_path}" ]; then
     shared_eb_sourcepath=${shared_fs_path}/easybuild/sources
     echo ">> Using ${shared_eb_sourcepath} as shared EasyBuild source path"
diff --git a/EESSI-remove-software.sh b/EESSI-remove-software.sh
index 98576efcb0..1a03a7af98 100755
--- a/EESSI-remove-software.sh
+++ b/EESSI-remove-software.sh
@@ -129,6 +129,9 @@ if [ $EUID -eq 0 ]; then
                     echo_yellow "Removing ${app_dir} and ${app_module}..."
                     rm -rf ${app_dir}
                     rm -rf ${app_module}
+                    # recreate some directory to work around permission denied
+                    # issues when rebuilding the package
+                    mkdir -p ${app_dir}/easybuild
                 done
             else
                 fatal_error "Easystack file ${easystack_file} not found!"
diff --git a/bot/build.sh b/bot/build.sh
index 3fd343e96f..81b3ef4660 100755
--- a/bot/build.sh
+++ b/bot/build.sh
@@ -208,6 +208,7 @@ else
     declare -a REMOVAL_STEP_ARGS=()
     REMOVAL_STEP_ARGS+=("--save" "${TARBALL_TMP_REMOVAL_STEP_DIR}")
     REMOVAL_STEP_ARGS+=("--storage" "${STORAGE}")
+
     # add fakeroot option in order to be able to remove software, see:
     # https://github.com/EESSI/software-layer/issues/312
     REMOVAL_STEP_ARGS+=("--fakeroot")
diff --git a/bot/check-build.sh b/bot/check-build.sh
index f185b18dda..41aeab258e 100755
--- a/bot/check-build.sh
+++ b/bot/check-build.sh
@@ -17,6 +17,7 @@
 #  - SUCCESS (all of)
 #    - working directory contains slurm-JOBID.out file
 #    - working directory contains eessi*tar.gz
+#    - no message FATAL
 #    - no message ERROR
 #    - no message FAILED
 #    - no message ' required modules missing:'
@@ -25,6 +26,7 @@
 #  - FAILED (one of ... implemented as NOT SUCCESS)
 #    - no slurm-JOBID.out file
 #    - no tarball
+#    - message with FATAL
 #    - message with ERROR
 #    - message with FAILED
 #    - message with ' required modules missing:'
@@ -105,6 +107,16 @@ else
     [[ ${VERBOSE} -ne 0 ]] && echo "   Slurm output file '"${job_out}"' NOT found"
 fi
 
+FATAL=-1
+if [[ ${SLURM_OUTPUT_FOUND} -eq 1 ]]; then
+  GP_fatal='FATAL: '
+  grep_out=$(grep -v "^>> searching for " ${job_dir}/${job_out} | grep "${GP_fatal}")
+  [[ $? -eq 0 ]] && FATAL=1 || FATAL=0
+  # have to be careful to not add searched for pattern into slurm out file
+  [[ ${VERBOSE} -ne 0 ]] && echo ">> searching for '"${GP_fatal}"'"
+  [[ ${VERBOSE} -ne 0 ]] && echo "${grep_out}"
+fi
+
 ERROR=-1
 if [[ ${SLURM_OUTPUT_FOUND} -eq 1 ]]; then
   GP_error='ERROR: '
@@ -163,6 +175,7 @@ fi
 
 [[ ${VERBOSE} -ne 0 ]] && echo "SUMMARY: ${job_dir}/${job_out}"
 [[ ${VERBOSE} -ne 0 ]] && echo "  <test name>: <actual result> (<expected result>)"
+[[ ${VERBOSE} -ne 0 ]] && echo "  FATAL......: $([[ $FATAL -eq 1 ]] && echo 'yes' || echo 'no') (no)"
 [[ ${VERBOSE} -ne 0 ]] && echo "  ERROR......: $([[ $ERROR -eq 1 ]] && echo 'yes' || echo 'no') (no)"
 [[ ${VERBOSE} -ne 0 ]] && echo "  FAILED.....: $([[ $FAILED -eq 1 ]] && echo 'yes' || echo 'no') (no)"
 [[ ${VERBOSE} -ne 0 ]] && echo "  REQ_MISSING: $([[ $MISSING -eq 1 ]] && echo 'yes' || echo 'no') (no)"
@@ -190,6 +203,7 @@ job_result_file=_bot_job${SLURM_JOB_ID}.result
 
 # Default reason:
 if [[ ${SLURM_OUTPUT_FOUND} -eq 1 ]] && \
+   [[ ${FATAL} -eq 0 ]] && \
    [[ ${ERROR} -eq 0 ]] && \
    [[ ${FAILED} -eq 0 ]] && \
    [[ ${MISSING} -eq 0 ]] && \
@@ -223,6 +237,7 @@ fi
 #     <dt>_Details_</dt>
 #     <dd>
 #       :white_check_mark: job output file <code>slurm-4682.out</code><br/>
+#       :white_check_mark: no message matching <code>FATAL: </code><br/>
 #       :white_check_mark: no message matching <code>ERROR: </code><br/>
 #       :white_check_mark: no message matching <code>FAILED: </code><br/>
 #       :white_check_mark: no message matching <code> required modules missing:</code><br/>
@@ -264,6 +279,7 @@ fi
 #     <dt>_Details_</dt>
 #     <dd>
 #       :white_check_mark: job output file <code>slurm-4682.out</code><br/>
+#       :x: no message matching <code>FATAL: </code><br/>
 #       :x: no message matching <code>ERROR: </code><br/>
 #       :white_check_mark: no message matching <code>FAILED: </code><br/>
 #       :x: no message matching <code> required modules missing:</code><br/>
@@ -381,6 +397,10 @@ success_msg="job output file <code>${job_out}</code>"
 failure_msg="no job output file <code>${job_out}</code>"
 comment_details_list=${comment_details_list}$(add_detail ${SLURM_OUTPUT_FOUND} 1 "${success_msg}" "${failure_msg}")
 
+success_msg="no message matching <code>${GP_fatal}</code>"
+failure_msg="found message matching <code>${GP_fatal}</code>"
+comment_details_list=${comment_details_list}$(add_detail ${FATAL} 0 "${success_msg}" "${failure_msg}")
+
 success_msg="no message matching <code>${GP_error}</code>"
 failure_msg="found message matching <code>${GP_error}</code>"
 comment_details_list=${comment_details_list}$(add_detail ${ERROR} 0 "${success_msg}" "${failure_msg}")
diff --git a/create_lmodsitepackage.py b/create_lmodsitepackage.py
index 11ca614be5..e959572ab1 100755
--- a/create_lmodsitepackage.py
+++ b/create_lmodsitepackage.py
@@ -114,7 +114,7 @@
     -- If we try to load CUDA itself, check if the full CUDA SDK was installed on the host in host_injections.
     -- This is required for end users to build additional CUDA software. If the full SDK isn't present, refuse
     -- to load the CUDA module and print an informative message on how to set up GPU support for EESSI
-    local refer_to_docs = "For more information on how to do this, see https://www.eessi.io/docs/gpu/.\\n"
+    local refer_to_docs = "For more information on how to do this, see https://www.eessi.io/docs/site_specific_config/gpu/.\\n"
     if simpleName == 'CUDA' then
         -- get the full host_injections path
         local hostInjections = string.gsub(os.getenv('EESSI_SOFTWARE_PATH') or "", 'versions', 'host_injections')
diff --git a/easystacks/software.eessi.io/2023.06/eessi-2023.06-eb-4.9.4-2023b.yml b/easystacks/software.eessi.io/2023.06/eessi-2023.06-eb-4.9.4-2023b.yml
index 77287f0daf..d9b7dca5d5 100644
--- a/easystacks/software.eessi.io/2023.06/eessi-2023.06-eb-4.9.4-2023b.yml
+++ b/easystacks/software.eessi.io/2023.06/eessi-2023.06-eb-4.9.4-2023b.yml
@@ -8,3 +8,8 @@ easyconfigs:
         # see https://github.com/easybuilders/easybuild-easyblocks/pull/3496
         include-easyblocks-from-commit: 60633b0acfd41a0732992d9e16800dae71a056eb
   - Cython-3.0.10-GCCcore-13.2.0.eb
+  - Mustache-1.3.3-foss-2023b.eb:
+      options:
+        # see https://github.com/easybuilders/easybuild-easyconfigs/pull/21783
+        from-commit: 5fa3db9eb36f91cba3fbf351549f8ba2849abc33 
+  - GDRCopy-2.4-GCCcore-13.2.0.eb
diff --git a/easystacks/software.eessi.io/2023.06/rebuilds/20241112-eb-4.9.4-EESSI-extend.yml b/easystacks/software.eessi.io/2023.06/rebuilds/20241112-eb-4.9.4-EESSI-extend.yml
new file mode 100644
index 0000000000..e4c658784f
--- /dev/null
+++ b/easystacks/software.eessi.io/2023.06/rebuilds/20241112-eb-4.9.4-EESSI-extend.yml
@@ -0,0 +1,6 @@
+# 2024.11.12
+# for installations under /cvmfs, if EESSI_ACCELERATOR_TARGET is set,
+# EESSI-extend should adjust EASYBUILD_INSTALLPATH and set
+# EASYBUILD_CUDA_COMPUTE_CAPABILITIES
+easyconfigs:
+  - EESSI-extend-2023.06-easybuild.eb
diff --git a/load_eessi_extend_module.sh b/load_eessi_extend_module.sh
new file mode 100755
index 0000000000..62b6e3f3ae
--- /dev/null
+++ b/load_eessi_extend_module.sh
@@ -0,0 +1,116 @@
+# Script to load the environment module for EESSI-extend.
+# If that module is not available yet, a specific version will be installed using the latest EasyBuild.
+#
+# This script must be sourced, since it makes changes in the current environment, like loading an EESSI-extend module.
+#
+# Assumptions (if one is not satisfied the script prints a message and exits)
+# - EESSI version is given as first argument
+# - TMPDIR is set
+# - EB is set
+# - EASYBUILD_INSTALLPATH needs to be set
+# - Function check_exit_code is defined;
+#   scripts/utils.sh in EESSI/software-layer repository defines this function, hence
+#   scripts/utils.sh shall be sourced before this script is run
+#
+# This script is part of the EESSI software layer, see
+# https://github.com/EESSI/software-layer.git
+#
+# author: Kenneth Hoste (@boegel, HPC-UGent)
+# author: Alan O'Cais (@ocaisa, CECAM)
+# author: Thomas Roeblitz (@trz42, University of Bergen)
+#
+# license: GPLv2
+#
+#
+set -o pipefail
+
+# this script is *sourced*, not executed, so can't rely on $0 to determine path to self or script name
+# $BASH_SOURCE points to correct path or script name, see also http://mywiki.wooledge.org/BashFAQ/028
+if [ $# -ne 1 ]; then
+    echo "Usage: source ${BASH_SOURCE} <EESSI-extend version>" >&2
+    exit 1
+fi
+
+EESSI_EXTEND_VERSION="${1}-easybuild"
+
+# make sure that environment variables that we expect to be set are indeed set
+if [ -z "${TMPDIR}" ]; then
+    echo "\$TMPDIR is not set; exiting" >&2
+    exit 2
+fi
+
+# ${EB} is used to specify which 'eb' command should be used;
+# can potentially be more than just 'eb', for example when using 'eb --optarch=GENERIC'
+if [ -z "${EB}" ]; then
+    echo "\$EB is not set; exiting" >&2
+    exit 2
+fi
+
+# ${EASYBUILD_INSTALLPATH} points to the installation path and needs to be set
+if [ -z "${EASYBUILD_INSTALLPATH}" ]; then
+    echo "\$EASYBUILD_INSTALLPATH is not set; exiting" >&2
+    exit 2
+fi
+
+# make sure that utility functions are defined (cfr. scripts/utils.sh script in EESSI/software-layer repo)
+type check_exit_code
+if [ $? -ne 0 ]; then
+    echo "check_exit_code function is not defined; exiting" >&2
+    exit 3
+fi
+
+echo ">> Checking for EESSI-extend module..."
+
+ml_av_eessi_extend_out=${TMPDIR}/ml_av_eessi_extend.out
+# need to use --ignore_cache to avoid the case that the module was removed (to be
+# rebuilt) but it is still in the cache
+module --ignore_cache avail 2>&1 | grep -i EESSI-extend/${EESSI_EXTEND_VERSION} &> ${ml_av_eessi_extend_out}
+
+if [[ $? -eq 0 ]]; then
+    echo_green ">> Module for EESSI-extend/${EESSI_EXTEND_VERSION} found!"
+else
+    echo_yellow ">> No module yet for EESSI-extend/${EESSI_EXTEND_VERSION}, installing it..."
+
+    EB_TMPDIR=${TMPDIR}/ebtmp
+    echo ">> Using temporary installation of EasyBuild (in ${EB_TMPDIR})..."
+    pip_install_out=${TMPDIR}/pip_install.out
+    pip3 install --prefix ${EB_TMPDIR} easybuild &> ${pip_install_out}
+
+    # keep track of original $PATH and $PYTHONPATH values, so we can restore them
+    ORIG_PATH=${PATH}
+    ORIG_PYTHONPATH=${PYTHONPATH}
+
+    # source configure_easybuild to use correct eb settings
+    (
+        export EASYBUILD_PREFIX=${TMPDIR}/easybuild
+        export EASYBUILD_READ_ONLY_INSTALLDIR=1
+
+        echo ">> Final installation in ${EASYBUILD_INSTALLPATH}..."
+        export PATH=${EB_TMPDIR}/bin:${PATH}
+        export PYTHONPATH=$(ls -d ${EB_TMPDIR}/lib/python*/site-packages):${PYTHONPATH}
+        eb_install_out=${TMPDIR}/eb_install.out
+        ok_msg="EESSI-extend/${EESSI_EXTEND_VERSION} installed, let's go!"
+        fail_msg="Installing EESSI-extend/${EESSI_EXTEND_VERSION} failed, that's not good... (output: ${eb_install_out})"
+        # while always adding --try-amend=keep... may do no harm, we could make
+        # an attempt to figure out if it is needed, e.g., when we are rebuilding
+        ${EB} "EESSI-extend-${EESSI_EXTEND_VERSION}.eb" --try-amend=keeppreviousinstall=True 2>&1 | tee ${eb_install_out}
+        check_exit_code $? "${ok_msg}" "${fail_msg}"
+    )
+
+    # restore origin $PATH and $PYTHONPATH values, and clean up environment variables that are no longer needed
+    export PATH=${ORIG_PATH}
+    export PYTHONPATH=${ORIG_PYTHONPATH}
+    unset EB_TMPDIR ORIG_PATH ORIG_PYTHONPATH
+
+    module --ignore_cache avail EESSI-extend/${EESSI_EXTEND_VERSION} &> ${ml_av_eessi_extend_out}
+    if [[ $? -eq 0 ]]; then
+        echo_green ">> EESSI-extend/${EESSI_EXTEND_VERSION} module installed!"
+    else
+        fatal_error "EESSI-extend/${EESSI_EXTEND_VERSION} module failed to install?! (output of 'pip install' in ${pip_install_out}, output of 'eb' in ${eb_install_out}, output of 'module avail EESSI-extend' in ${ml_av_eessi_extend_out})"
+    fi
+fi
+
+echo ">> Loading EESSI-extend/${EESSI_EXTEND_VERSION} module..."
+module --ignore_cache load EESSI-extend/${EESSI_EXTEND_VERSION}
+
+unset EESSI_EXTEND_VERSION
diff --git a/scripts/gpu_support/nvidia/install_cuda_and_libraries.sh b/scripts/gpu_support/nvidia/install_cuda_and_libraries.sh
index e6343595ad..741ead0559 100755
--- a/scripts/gpu_support/nvidia/install_cuda_and_libraries.sh
+++ b/scripts/gpu_support/nvidia/install_cuda_and_libraries.sh
@@ -77,10 +77,6 @@ done
 # Make sure EESSI is initialised
 check_eessi_initialised
 
-# Make sure that `EESSI-extend` will install in the site installation path EESSI_SITE_SOFTWARE_PATH
-export EESSI_SITE_INSTALL=1
-echo "EESSI_SITE_SOFTWARE_PATH=${EESSI_SITE_SOFTWARE_PATH}"
-
 # we need a directory we can use for temporary storage
 if [[ -z "${TEMP_DIR}" ]]; then
     tmpdir=$(mktemp -d)
@@ -93,7 +89,7 @@ else
 fi
 echo "Created temporary directory '${tmpdir}'"
 
-# use EESSI_SITE_SOFTWARE_PATH/.modules/all as MODULEPATH
+# Store MODULEPATH so it can be restored at the end of each loop iteration
 SAVE_MODULEPATH=${MODULEPATH}
 
 for EASYSTACK_FILE in ${TOPDIR}/easystacks/eessi-*CUDA*.yml; do
@@ -103,8 +99,16 @@ for EASYSTACK_FILE in ${TOPDIR}/easystacks/eessi-*CUDA*.yml; do
     eb_version=$(echo ${EASYSTACK_FILE} | sed 's/.*eb-\([0-9.]*\).*/\1/g')
 
     # Load EasyBuild version for this easystack file _before_ loading EESSI-extend
-    module avail EasyBuild
+    module_avail_out=${tmpdir}/ml.out
+    module avail 2>&1 | grep EasyBuild/${eb_version} &> ${module_avail_out}
+    if [[ $? -eq 0 ]]; then
+        echo_green ">> Found an EasyBuild/${eb_version} module"
+    else
+        echo_yellow ">> No EasyBuild/${eb_version} module found: skipping step to install easystack file ${easystack_file} (see output in ${module_avail_out})"
+        continue
+    fi
     module load EasyBuild/${eb_version}
+
     # Make sure EESSI-extend does a site install here
     # We need to reload it with the current environment variables set
     unset EESSI_CVMFS_INSTALL
@@ -112,7 +116,19 @@ for EASYSTACK_FILE in ${TOPDIR}/easystacks/eessi-*CUDA*.yml; do
     unset EESSI_USER_INSTALL
     export EESSI_SITE_INSTALL=1
     module unload EESSI-extend
-    module load EESSI-extend/${EESSI_VERSION}-easybuild
+    ml_av_eessi_extend_out=${tmpdir}/ml_av_eessi_extend.out
+    # need to use --ignore_cache to avoid the case that the module was removed (to be
+    # rebuilt) but it is still in the cache and the rebuild failed
+    EESSI_EXTEND_VERSION=${EESSI_VERSION}-easybuild
+    module --ignore_cache avail 2>&1 | grep -i EESSI-extend/${EESSI_EXTEND_VERSION} &> ${ml_av_eessi_extend_out}
+    if [[ $? -eq 0 ]]; then
+        echo_green ">> Module for EESSI-extend/${EESSI_EXTEND_VERSION} found!"
+    else
+        error="\nNo module for EESSI-extend/${EESSI_EXTEND_VERSION} found\nwhile EESSI has been initialised to use software under ${EESSI_SOFTWARE_PATH}\n"
+        fatal_error "${error}"
+    fi
+    module --ignore_cache load EESSI-extend/${EESSI_EXTEND_VERSION}
+    unset EESSI_EXTEND_VERSION
 
     # Install modules in hidden .modules dir to keep track of what was installed before
     # (this action is temporary, and we do not call Lmod again within the current shell context, but in EasyBuild
@@ -239,9 +255,11 @@ for EASYSTACK_FILE in ${TOPDIR}/easystacks/eessi-*CUDA*.yml; do
       echo_green "all installations at ${EESSI_SITE_SOFTWARE_PATH}/software/... succeeded!"
     fi
 
-    # clean up tmpdir
-    rm -rf "${tmpdir}"
+    # clean up tmpdir content
+    rm -rf "${tmpdir}"/*
 
     # Restore MODULEPATH for next loop iteration
     MODULEPATH=${SAVE_MODULEPATH}
 done
+# Remove the temporary directory
+rm -rf "${tmpdir}"