diff --git a/Dockerfiles/linux-ubuntu22.04-x86_64_v2/Dockerfile b/Dockerfiles/linux-ubuntu22.04-x86_64_v2/Dockerfile
index d566f12..a16cb2c 100644
--- a/Dockerfiles/linux-ubuntu22.04-x86_64_v2/Dockerfile
+++ b/Dockerfiles/linux-ubuntu22.04-x86_64_v2/Dockerfile
@@ -35,7 +35,7 @@ COPY Dockerfiles/linux-ubuntu22.04-x86_64_v2/compilers.yaml Dockerfiles/linux-ub
 RUN --mount=type=cache,target=/root/.spack/cache \
     spack -e . concretize -f && \
     spack -e . env depfile -o Makefile && \
-    make -j && \
+    make -j $(nproc) && \
     spack -e . gc --yes-to-all
 
 # Remove Spack metadata, python cache and static libraries to save some bytes
diff --git a/Dockerfiles/pcluster-amazonlinux-2/Dockerfile b/Dockerfiles/pcluster-amazonlinux-2/Dockerfile
index e9481c2..b1b1052 100644
--- a/Dockerfiles/pcluster-amazonlinux-2/Dockerfile
+++ b/Dockerfiles/pcluster-amazonlinux-2/Dockerfile
@@ -77,7 +77,7 @@ RUN curl -sOL https://github.com/benmcollins/libjwt/archive/refs/tags/v${LIBJWT_
     && cd libjwt-${LIBJWT_VERSION}/ \
     && autoreconf --force --install \
     && ./configure --prefix=/opt/libjwt \
-    && make -j \
+    && make -j $(nproc) \
     && make install && make clean \
     && cd .. \
     && rm -rf v${LIBJWT_VERSION}.tar.gz libjwt-${LIBJWT_VERSION}
@@ -87,7 +87,7 @@ RUN curl -sOL https://github.com/openpmix/openpmix/releases/download/v${PMIX_VER
     && cd pmix-${PMIX_VERSION} \
     && ./autogen.pl \
     && ./configure --prefix=/opt/pmix \
-    && make -j \
+    && make -j $(nproc) \
     && make install && make clean \
     && cd .. \
     && rm -rf pmix-${PMIX_VERSION}.tar.gz pmix-${PMIX_VERSION}
@@ -97,7 +97,7 @@ RUN curl -sOL https://github.com/SchedMD/slurm/archive/slurm-${SLURM_VERSION}.ta
     && tar xf slurm-${SLURM_VERSION}.tar.gz \
     && cd slurm-slurm-${SLURM_VERSION}/ \
     && ./configure --prefix=/opt/slurm --with-pmix=/opt/pmix --with-jwt=/opt/libjwt \
-    && make -j \
+    && make -j $(nproc) \
     && make install && make install-contrib && make clean \
     && cd .. \
     && rm -rf slurm-${SLURM_VERSION}.tar.gz slurm-slurm-${SLURM_VERSION}
diff --git a/Dockerfiles/tutorial-ubuntu-22.04/Dockerfile b/Dockerfiles/tutorial-ubuntu-22.04/Dockerfile
index f8b63f7..e2e8914 100644
--- a/Dockerfiles/tutorial-ubuntu-22.04/Dockerfile
+++ b/Dockerfiles/tutorial-ubuntu-22.04/Dockerfile
@@ -34,7 +34,7 @@ COPY Dockerfiles/tutorial-ubuntu-22.04/compilers.yaml Dockerfiles/tutorial-ubunt
 RUN --mount=type=cache,target=/root/.spack/cache \
     spack -e . concretize -f && \
     spack -e . env depfile -o Makefile && \
-    make -j && \
+    make -j $(nproc) && \
     spack -e . gc --yes-to-all
 
 # Remove Spack metadata, python cache and static libraries to save some bytes