diff --git a/Dockerfile.linux b/Dockerfile.linux
index 2c55bc924d..9119fc1c86 100644
--- a/Dockerfile.linux
+++ b/Dockerfile.linux
@@ -33,7 +33,9 @@ WORKDIR /sources
 COPY shared_functions.sh shared_functions.sh
 RUN chmod +x shared_functions.sh
 
-RUN /bin/bash -c "source shared_functions.sh && get_debs_gitcloner && install_debs_gitcloner && clone_git_repos"
+RUN /bin/bash -c "source shared_functions.sh && get_debs_gitcloner"
+RUN --network=none /bin/bash -c "source shared_functions.sh && install_debs_gitcloner" 
+RUN /bin/bash -c "source shared_functions.sh && clone_git_repos"
 
 # Stage 3: Builder
 FROM ubuntu:16.04@sha256:1f1a2d56de1d604801a9671f301190704c25d604a416f59e03c04f5c6ffee0d6 as builder
@@ -47,5 +49,5 @@ COPY --from=gitcloner /sources /sources
 COPY shared_functions.sh shared_functions.sh
 RUN chmod +x shared_functions.sh
 
-# Single CMD with multiple build steps
-RUN /bin/bash -c "source shared_functions.sh && build_all"
\ No newline at end of file
+# Build with --network=none
+RUN --network=none /bin/bash -c "source shared_functions.sh && build_all"
\ No newline at end of file
diff --git a/shared_functions.sh b/shared_functions.sh
index 9e8530e9f8..98d5714e01 100755
--- a/shared_functions.sh
+++ b/shared_functions.sh
@@ -500,7 +500,9 @@ install_debs_gitcloner() {
 }
 
 clone_git_repos() {
-    git_clone_reset "${gitrepo_list[@]}"
+    for repo in "${gitrepo_list[@]}"; do
+        git_clone_reset "$repo"
+    done
     #Qt5 special case todo: commit hashes
     git clone git://code.qt.io/qt/qt5.git -b ${QT_VERSION} --depth 1
     cd qt5