diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index b7c1bf03239aa3a6d05e8754c46d42011b03d7f2..e085c2e018a98bc3234fd87f5346d1733a328161 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -270,28 +270,6 @@ FileLicenceCheck:
   tags:
     - CbmRoot_apptainer
 
-.apptainer_debian10_variables_apr21: &apptainer_debian10_variables_apr21
-    OS: debian10
-    FAIRSOFT_VERSION: apr21p2
-    FAIRROOT_VERSION: v18.6.7
-    BASE_PATH: "/cvmfs/fairsoft.gsi.de/$OS"
-    SIMPATH: "$BASE_PATH/fairsoft/$FAIRSOFT_VERSION"
-    FAIRROOTPATH: "$BASE_PATH/fairroot/${FAIRROOT_VERSION}_fs_${FAIRSOFT_VERSION}"
-    CONFIGFILE: "/cvmfs/cbm.gsi.de/$OS/bin/setup_development_environment.sh"
-    INSTALL_PROJECT: "TRUE"
-    EXTRA_FLAGS: '"-DCBM_TEST_INSTALL=TRUE"'
-
-.apptainer_debian10_variables_nov22p1: &apptainer_debian10_variables_nov22p1
-    OS: debian10
-    FAIRSOFT_VERSION: nov22p1
-    FAIRROOT_VERSION: v18.8.0
-    BASE_PATH: "/cvmfs/fairsoft.gsi.de/$OS/"
-    SIMPATH: "$BASE_PATH/fairsoft/$FAIRSOFT_VERSION"
-    FAIRROOTPATH: "$BASE_PATH/fairroot/${FAIRROOT_VERSION}_fs_${FAIRSOFT_VERSION}"
-    CONFIGFILE: "/cvmfs/cbm.gsi.de/$OS/bin/setup_development_environment.sh"
-    INSTALL_PROJECT: "TRUE"
-    EXTRA_FLAGS: '"-DCBM_TEST_INSTALL=TRUE"'
-
 .apptainer_centos7_variables_apr21: &apptainer_centos7_variables_apr21
     OS: centos7
     FAIRSOFT_VERSION: apr21p2
@@ -320,6 +298,8 @@ FileLicenceCheck:
     SIMPATH: "$BASE_PATH/fairsoft/$FAIRSOFT_VERSION"
     FAIRROOTPATH: "$BASE_PATH/fairroot/${FAIRROOT_VERSION}_fs_${FAIRSOFT_VERSION}"
     CONFIGFILE: "/cvmfs/cbm.gsi.de/debian10/bin/setup_development_environment.sh"
+    INSTALL_PROJECT: "TRUE"
+    EXTRA_FLAGS: '"-DCBM_TEST_INSTALL=TRUE"'
 
 .apptainer_vae23_variables_nov22p1: &apptainer_vae23_variables_nov22p1
     CONTAINER: "/cvmfs/vae.gsi.de/vae23/containers/user_container-develop.sif"
@@ -331,6 +311,8 @@ FileLicenceCheck:
     SIMPATH: "$BASE_PATH/fairsoft/$FAIRSOFT_VERSION"
     FAIRROOTPATH: "$BASE_PATH/fairroot/${FAIRROOT_VERSION}_fs_${FAIRSOFT_VERSION}"
     CONFIGFILE: "/cvmfs/cbm.gsi.de/debian10/bin/setup_development_environment.sh"
+    INSTALL_PROJECT: "TRUE"
+    EXTRA_FLAGS: '"-DCBM_TEST_INSTALL=TRUE"'
 
 .apptainer_debian11_variables_apr21: &apptainer_debian11_variables_apr21
     CONTAINER: "/cvmfs/cbm.gsi.de/containers/debian11_v18.6.7_apr21p2.sif"
@@ -351,6 +333,8 @@ FileLicenceCheck:
     BASE_PATH: "/opt"
     SIMPATH: "$BASE_PATH/fairsoft/$FAIRSOFT_VERSION"
     FAIRROOTPATH: "$BASE_PATH/fairroot/${FAIRROOT_VERSION}_${FAIRSOFT_VERSION}"
+    INSTALL_PROJECT: "TRUE"
+    EXTRA_FLAGS: '"-DCBM_TEST_INSTALL=TRUE"'
 
 .linux_tag: &linux_tag
   stage: build
@@ -466,16 +450,6 @@ CbmRoot_Merge_Apptainer_debian12_nov22p1:
   variables:
     <<: [*mergeRequestVariables, *apptainer_debian12_variables_nov22p1]
 
-CbmRoot_Merge_Apptainer_debian10_apr21:
-  <<: [*apptainer_tag, *check_merge_request, *build_and_test]
-  variables:
-    <<: [*mergeRequestVariables, *apptainer_debian10_variables_apr21]
-
-CbmRoot_Merge_Apptainer_debian10_nov22p1:
-  <<: [*apptainer_tag, *check_merge_request, *build_and_test]
-  variables:
-    <<: [*mergeRequestVariables, *apptainer_debian10_variables_nov22p1]
-
 CbmRoot_Merge_Apptainer_debian11_apr21:
   <<: [*apptainer_tag, *check_merge_request, *build_and_test]
   variables: