diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index 6d97e4e9697a4e368ee4d1f6d451878d9c3c4146..a6459a46535a391fc198d2fc7d41658461486215 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -98,21 +98,21 @@ dune:2.5:
 dune:git:
  stage: stage2
  script:
- - ./bin/duneci-build-docker-image --no-cache duneci/dune:git dune-git
+ - ./bin/duneci-build-docker-image --parallel --no-cache duneci/dune:git dune-git
  only:
  - master@ansgar/dune-docker
 
 dune-fufem:2.4:
  stage: stage3
  script:
- - ./bin/duneci-build-docker-image duneci/dune-fufem:2.4 dune-fufem
+ - ./bin/duneci-build-docker-image --parallel duneci/dune-fufem:2.4 dune-fufem
  only:
  - master@ansgar/dune-docker
 
 dune-fufem:git:
  stage: stage3
  script:
- - ./bin/duneci-build-docker-image --no-cache duneci/dune-fufem:git dune-fufem-git
+ - ./bin/duneci-build-docker-image --parallel --no-cache duneci/dune-fufem:git dune-fufem-git
  only:
  - master@ansgar/dune-docker
 
diff --git a/bin/duneci-build-docker-image b/bin/duneci-build-docker-image
index e8286b57c1388ebb922d91eee353f1c1388a3e20..5d28659323158cb8b408071d24f02038e7ee29a8 100755
--- a/bin/duneci-build-docker-image
+++ b/bin/duneci-build-docker-image
@@ -27,8 +27,14 @@ if [[ $# -lt 2 ]]; then
   usage
 fi
 
+parallel=
+
 while :; do
   case "${1}" in
+    --parallel)
+      parallel=1
+      shift
+      ;;
     -*)
       docker_opts+=("${1}")
       shift
@@ -41,6 +47,10 @@ done
 
 image="${1}"; shift
 
+if [[ -n "${parallel}" -a -v DUNECI_PARALLEL ]]; then
+  docker_opts+=(--build-arg=DUNECI_PARALLEL="${DUNECI_PARALLEL}")
+fi
+
 builddir="build/${image##*/}"
 if [[ -e ${builddir} ]]; then
   echo "E: ${builddir} already exists" >&2
diff --git a/dune-fufem-git/Dockerfile b/dune-fufem-git/Dockerfile
index 462be832b336f48359390248e010fc0dfa4a7b6d..d540c6751c9a057989b91a9e6802dc931f34c20f 100644
--- a/dune-fufem-git/Dockerfile
+++ b/dune-fufem-git/Dockerfile
@@ -1,4 +1,5 @@
 FROM duneci/dune:git
+ARG DUNECI_PARALLEL
 
 USER duneci
 WORKDIR /duneci/modules
diff --git a/dune-fufem/Dockerfile b/dune-fufem/Dockerfile
index 4600e392326db417a8b31ed50ec6eb9888d0a7c1..3c3aa40be97c32aae727eb3247db2ce49356a46f 100644
--- a/dune-fufem/Dockerfile
+++ b/dune-fufem/Dockerfile
@@ -1,4 +1,5 @@
 FROM duneci/dune:2.4
+ARG DUNECI_PARALLEL
 
 USER root
 WORKDIR /
diff --git a/dune-git/Dockerfile b/dune-git/Dockerfile
index a2c5dc33d81e8106142784959447691efa0faf1a..b76e0f701cbe06f0267e426c280c6e217c228df2 100644
--- a/dune-git/Dockerfile
+++ b/dune-git/Dockerfile
@@ -1,4 +1,5 @@
 FROM duneci/base:9
+ARG DUNECI_PARALLEL
 
 USER duneci
 RUN duneci-install-module https://gitlab.dune-project.org/core/dune-common.git \